764591 has 2 divisors, whose sum is σ = 764592. Its totient is φ = 764590.

The previous prime is 764587. The next prime is 764593. The reversal of 764591 is 195467.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 764591 - 2² = 764587 is a prime.

Together with 764593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764593) 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 as a sum of consecutive naturals, namely, 382295 + 382296.

It is an arithmetic number, because the mean of its divisors is an integer number (382296).

2⁷⁶⁴⁵⁹¹ is an apocalyptic number.

764591 is a deficient number, since it is larger than the sum of its proper divisors (1).

764591 is an equidigital number, since it uses as much as digits as its factorization.

764591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 764591 is about 874.4089432297. The cubic root of 764591 is about 91.4414408270.

The spelling of 764591 in words is "seven hundred sixty-four thousand, five hundred ninety-one".