764887 has 2 divisors, whose sum is σ = 764888. Its totient is φ = 764886.

The previous prime is 764857. The next prime is 764891. The reversal of 764887 is 788467.

It is a strong prime.

It is an emirp because it is prime and its reverse (788467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 764887 - 2¹⁹ = 240599 is a prime.

It is a Chen prime.

764887 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764837) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382443 + 382444.

It is an arithmetic number, because the mean of its divisors is an integer number (382444).

2⁷⁶⁴⁸⁸⁷ is an apocalyptic number.

764887 is a deficient number, since it is larger than the sum of its proper divisors (1).

764887 is an equidigital number, since it uses as much as digits as its factorization.

764887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 40.

The square root of 764887 is about 874.5781840407. The cubic root of 764887 is about 91.4532393678.

The spelling of 764887 in words is "seven hundred sixty-four thousand, eight hundred eighty-seven".