764808421 has 8 divisors (see below), whose sum is σ = 823898880. Its totient is φ = 705754992.

The previous prime is 764808377. The next prime is 764808433. The reversal of 764808421 is 124808467.

764808421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 764808421 - 2⁷ = 764808293 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 (764808481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45816 + ... + 60238.

It is an arithmetic number, because the mean of its divisors is an integer number (102987360).

Almost surely, 2^764808421 is an apocalyptic number.

It is an amenable number.

764808421 is a deficient number, since it is larger than the sum of its proper divisors (59090459).

764808421 is a wasteful number, since it uses less digits than its factorization.

764808421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18515.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 764808421 is about 27655.1698783428. The cubic root of 764808421 is about 914.5010751081.

The spelling of 764808421 in words is "seven hundred sixty-four million, eight hundred eight thousand, four hundred twenty-one".