764037997 has 4 divisors (see below), whose sum is σ = 788684416. Its totient is φ = 739391580.

The previous prime is 764037977. The next prime is 764038003. The reversal of 764037997 is 799730467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-764037997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764037947) 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, 12323163 + ... + 12323224.

It is an arithmetic number, because the mean of its divisors is an integer number (197171104).

Almost surely, 2^764037997 is an apocalyptic number.

It is an amenable number.

764037997 is a deficient number, since it is larger than the sum of its proper divisors (24646419).

764037997 is a wasteful number, since it uses less digits than its factorization.

764037997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24646418.

The product of its (nonzero) digits is 2000376, while the sum is 52.

The square root of 764037997 is about 27641.2372552315. The cubic root of 764037997 is about 914.1939000191.

The spelling of 764037997 in words is "seven hundred sixty-four million, thirty-seven thousand, nine hundred ninety-seven".