764268921 has 24 divisors (see below), whose sum is σ = 1205620416. Its totient is φ = 463690080.

The previous prime is 764268893. The next prime is 764268937. The reversal of 764268921 is 129862467.

It is a happy number.

It is not a de Polignac number, because 764268921 - 2⁹ = 764268409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (764268941) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 37695 + ... + 54308.

It is an arithmetic number, because the mean of its divisors is an integer number (50234184).

Almost surely, 2^764268921 is an apocalyptic number.

764268921 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

764268921 is a deficient number, since it is larger than the sum of its proper divisors (441351495).

764268921 is a wasteful number, since it uses less digits than its factorization.

764268921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92093 (or 92090 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 764268921 is about 27645.4141043320. The cubic root of 764268921 is about 914.2859931907.

The spelling of 764268921 in words is "seven hundred sixty-four million, two hundred sixty-eight thousand, nine hundred twenty-one".