764449397 has 2 divisors, whose sum is σ = 764449398. Its totient is φ = 764449396.

The previous prime is 764449381. The next prime is 764449447. The reversal of 764449397 is 793944467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538518436 + 225930961 = 23206^2 + 15031^2 .

It is a cyclic number.

It is not a de Polignac number, because 764449397 - 2⁴ = 764449381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764445397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382224698 + 382224699.

It is an arithmetic number, because the mean of its divisors is an integer number (382224699).

Almost surely, 2^764449397 is an apocalyptic number.

It is an amenable number.

764449397 is a deficient number, since it is larger than the sum of its proper divisors (1).

764449397 is an equidigital number, since it uses as much as digits as its factorization.

764449397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 53.

The square root of 764449397 is about 27648.6780334974. The cubic root of 764449397 is about 914.3579546377.

The spelling of 764449397 in words is "seven hundred sixty-four million, four hundred forty-nine thousand, three hundred ninety-seven".