764431 has 2 divisors, whose sum is σ = 764432. Its totient is φ = 764430.

The previous prime is 764399. The next prime is 764447. The reversal of 764431 is 134467.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 764431 - 2⁵ = 764399 is a prime.

It is a super-2 number, since 2×764431² = 1168709507522, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 764396 and 764405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382215 + 382216.

It is an arithmetic number, because the mean of its divisors is an integer number (382216).

2⁷⁶⁴⁴³¹ is an apocalyptic number.

764431 is a deficient number, since it is larger than the sum of its proper divisors (1).

764431 is an equidigital number, since it uses as much as digits as its factorization.

764431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 764431 is about 874.3174480702. The cubic root of 764431 is about 91.4350619695.

Adding to 764431 its reverse (134467), we get a palindrome (898898).

The spelling of 764431 in words is "seven hundred sixty-four thousand, four hundred thirty-one".