1957630117 has 4 divisors (see below), whose sum is σ = 1989722476. Its totient is φ = 1925537760.

The previous prime is 1957630111. The next prime is 1957630139. The reversal of 1957630117 is 7110367591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 692689761 + 1264940356 = 26319^2 + 35566^2 .

It is a cyclic number.

It is not a de Polignac number, because 1957630117 - 2³ = 1957630109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1957630117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957630111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16046088 + ... + 16046209.

It is an arithmetic number, because the mean of its divisors is an integer number (497430619).

Almost surely, 2^1957630117 is an apocalyptic number.

It is an amenable number.

1957630117 is a deficient number, since it is larger than the sum of its proper divisors (32092359).

1957630117 is an equidigital number, since it uses as much as digits as its factorization.

1957630117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32092358.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 1957630117 is about 44245.1140466380. The cubic root of 1957630117 is about 1250.9603536145.

The spelling of 1957630117 in words is "one billion, nine hundred fifty-seven million, six hundred thirty thousand, one hundred seventeen".