1043198749 has 4 divisors (see below), whose sum is σ = 1048962460. Its totient is φ = 1037435040.

The previous prime is 1043198687. The next prime is 1043198771. The reversal of 1043198749 is 9478913401.

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 19518724 + 1023680025 = 4418^2 + 31995^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043198749 - 2⁷ = 1043198621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1043198699 and 1043198708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043198789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2881584 + ... + 2881945.

It is an arithmetic number, because the mean of its divisors is an integer number (262240615).

Almost surely, 2^1043198749 is an apocalyptic number.

It is an amenable number.

1043198749 is a deficient number, since it is larger than the sum of its proper divisors (5763711).

1043198749 is an equidigital number, since it uses as much as digits as its factorization.

1043198749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5763710.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1043198749 is about 32298.5874149319. The cubic root of 1043198749 is about 1014.1970722990.

The spelling of 1043198749 in words is "one billion, forty-three million, one hundred ninety-eight thousand, seven hundred forty-nine".