764134257 has 4 divisors (see below), whose sum is σ = 1018845680. Its totient is φ = 509422836.

The previous prime is 764134247. The next prime is 764134277. The reversal of 764134257 is 752431467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 764134257 - 2¹¹ = 764132209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764134247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127355707 + ... + 127355712.

It is an arithmetic number, because the mean of its divisors is an integer number (254711420).

Almost surely, 2^764134257 is an apocalyptic number.

It is an amenable number.

764134257 is a deficient number, since it is larger than the sum of its proper divisors (254711423).

764134257 is a wasteful number, since it uses less digits than its factorization.

764134257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254711422.

The product of its digits is 141120, while the sum is 39.

The square root of 764134257 is about 27642.9784393795. The cubic root of 764134257 is about 914.2322910458.

The spelling of 764134257 in words is "seven hundred sixty-four million, one hundred thirty-four thousand, two hundred fifty-seven".