749992109309 has 18 divisors (see below), whose sum is σ = 793921273470. Its totient is φ = 708385653360.

The previous prime is 749992109281. The next prime is 749992109329. The reversal of 749992109309 is 903901299947.

It can be written as a sum of positive squares in only one way, i.e., 557192081209 + 192800028100 = 746453^2 + 439090^2 .

It is not a de Polignac number, because 749992109309 - 2²⁰ = 749991060733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749992109329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 324530264 + ... + 324532574.

It is an arithmetic number, because the mean of its divisors is an integer number (44106737415).

Almost surely, 2^749992109309 is an apocalyptic number.

It is an amenable number.

749992109309 is a deficient number, since it is larger than the sum of its proper divisors (43929164161).

749992109309 is an frugal number, since it uses more digits than its factorization.

749992109309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5049 (or 2719 counting only the distinct ones).

The product of its (nonzero) digits is 9920232, while the sum is 62.

The spelling of 749992109309 in words is "seven hundred forty-nine billion, nine hundred ninety-two million, one hundred nine thousand, three hundred nine".