764669 has 4 divisors (see below), whose sum is σ = 782496. Its totient is φ = 746844.

The previous prime is 764657. The next prime is 764683. The reversal of 764669 is 966467.

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 764669 - 2¹⁶ = 699133 is a prime.

It is a super-2 number, since 2×764669² = 1169437359122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764629) 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, 8849 + ... + 8934.

It is an arithmetic number, because the mean of its divisors is an integer number (195624).

2⁷⁶⁴⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

764669 is a deficient number, since it is larger than the sum of its proper divisors (17827).

764669 is a wasteful number, since it uses less digits than its factorization.

764669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17826.

The product of its digits is 54432, while the sum is 38.

The square root of 764669 is about 874.4535436488. The cubic root of 764669 is about 91.4445501974. Note that the first 3 decimals are identical.

The spelling of 764669 in words is "seven hundred sixty-four thousand, six hundred sixty-nine".