764891 has 2 divisors, whose sum is σ = 764892. Its totient is φ = 764890.

The previous prime is 764887. The next prime is 764893. The reversal of 764891 is 198467.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 764891 - 2² = 764887 is a prime.

Together with 764893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (764893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382445 + 382446.

It is an arithmetic number, because the mean of its divisors is an integer number (382446).

2⁷⁶⁴⁸⁹¹ is an apocalyptic number.

764891 is a deficient number, since it is larger than the sum of its proper divisors (1).

764891 is an equidigital number, since it uses as much as digits as its factorization.

764891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 764891 is about 874.5804708545. The cubic root of 764891 is about 91.4533987867.

The spelling of 764891 in words is "seven hundred sixty-four thousand, eight hundred ninety-one".