764739427 has 2 divisors, whose sum is σ = 764739428. Its totient is φ = 764739426.

The previous prime is 764739413. The next prime is 764739449. The reversal of 764739427 is 724937467.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 764739427 - 2¹⁹ = 764215139 is a prime.

It is not a weakly prime, because it can be changed into another prime (764739467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382369713 + 382369714.

It is an arithmetic number, because the mean of its divisors is an integer number (382369714).

Almost surely, 2^764739427 is an apocalyptic number.

764739427 is a deficient number, since it is larger than the sum of its proper divisors (1).

764739427 is an equidigital number, since it uses as much as digits as its factorization.

764739427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 49.

The square root of 764739427 is about 27653.9224523394. The cubic root of 764739427 is about 914.4735749818.

It can be divided in two parts, 7647 and 39427, that added together give a palindrome (47074).

The spelling of 764739427 in words is "seven hundred sixty-four million, seven hundred thirty-nine thousand, four hundred twenty-seven".