764574721 has 4 divisors (see below), whose sum is σ = 775986352. Its totient is φ = 753163092.

The previous prime is 764574667. The next prime is 764574737. The reversal of 764574721 is 127475467.

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 not a de Polignac number, because 764574721 - 2⁷ = 764574593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764574791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5705715 + ... + 5705848.

It is an arithmetic number, because the mean of its divisors is an integer number (193996588).

Almost surely, 2^764574721 is an apocalyptic number.

It is an amenable number.

764574721 is a deficient number, since it is larger than the sum of its proper divisors (11411631).

764574721 is a wasteful number, since it uses less digits than its factorization.

764574721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11411630.

The product of its digits is 329280, while the sum is 43.

The square root of 764574721 is about 27650.9443057556. The cubic root of 764574721 is about 914.4079185879.

The spelling of 764574721 in words is "seven hundred sixty-four million, five hundred seventy-four thousand, seven hundred twenty-one".