764264005 has 4 divisors (see below), whose sum is σ = 917116812. Its totient is φ = 611411200.

The previous prime is 764263991. The next prime is 764264027. The reversal of 764264005 is 500462467.

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 196728676 + 567535329 = 14026^2 + 23823^2 .

It is a de Polignac number, because none of the positive numbers 2^k-764264005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76426396 + ... + 76426405.

It is an arithmetic number, because the mean of its divisors is an integer number (229279203).

Almost surely, 2^764264005 is an apocalyptic number.

It is an amenable number.

764264005 is a deficient number, since it is larger than the sum of its proper divisors (152852807).

764264005 is a wasteful number, since it uses less digits than its factorization.

764264005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152852806.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 764264005 is about 27645.3251925167. The cubic root of 764264005 is about 914.2840328687.

The spelling of 764264005 in words is "seven hundred sixty-four million, two hundred sixty-four thousand, five".