1043191957 has 4 divisors (see below), whose sum is σ = 1043260236. Its totient is φ = 1043123680.

The previous prime is 1043191939. The next prime is 1043192009. The reversal of 1043191957 is 7591913401.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7591913401 = 75079 ⋅101119.

It can be written as a sum of positive squares in 2 ways, for example, as 784336036 + 258855921 = 28006^2 + 16089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043191957 - 2²³ = 1034803349 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043195957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483 + ... + 45679.

It is an arithmetic number, because the mean of its divisors is an integer number (260815059).

Almost surely, 2^1043191957 is an apocalyptic number.

It is an amenable number.

1043191957 is a deficient number, since it is larger than the sum of its proper divisors (68279).

1043191957 is an equidigital number, since it uses as much as digits as its factorization.

1043191957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68278.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 1043191957 is about 32298.4822708436. The cubic root of 1043191957 is about 1014.1948712351.

It can be divided in two parts, 104319 and 1957, that added together give a square (106276 = 326²).

The spelling of 1043191957 in words is "one billion, forty-three million, one hundred ninety-one thousand, nine hundred fifty-seven".