864523513 has 24 divisors (see below), whose sum is σ = 1021797504. Its totient is φ = 729237600.

The previous prime is 864523507. The next prime is 864523531. The reversal of 864523513 is 315325468.

It is not a de Polignac number, because 864523513 - 2⁵ = 864523481 is a prime.

It is a super-2 number, since 2×864523513² = 1494801809059722338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (844523513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 948528 + ... + 949438.

It is an arithmetic number, because the mean of its divisors is an integer number (42574896).

Almost surely, 2^864523513 is an apocalyptic number.

It is an amenable number.

864523513 is a deficient number, since it is larger than the sum of its proper divisors (157273991).

864523513 is a wasteful number, since it uses less digits than its factorization.

864523513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1206 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 864523513 is about 29402.7807018316. The cubic root of 864523513 is about 952.6329592594.

The spelling of 864523513 in words is "eight hundred sixty-four million, five hundred twenty-three thousand, five hundred thirteen".