512479879129 has 3 divisors (see below), whose sum is σ = 512480595007. Its totient is φ = 512479163252.

The previous prime is 512479879049. The next prime is 512479879133. The reversal of 512479879129 is 921978974215.

The square root of 512479879129 is 715877.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 101152622025 + 411327257104 = 318045^2 + 641348^2 .

It is a de Polignac number, because none of the positive numbers 2^k-512479879129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512479879139) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 357939 + ... + 1073815.

Almost surely, 2^512479879129 is an apocalyptic number.

512479879129 is the 715877-th square number.

512479879129 is the 357939-th centered octagonal number.

It is an amenable number.

512479879129 is a deficient number, since it is larger than the sum of its proper divisors (715878).

512479879129 is an frugal number, since it uses more digits than its factorization.

512479879129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431754 (or 715877 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 64.

Multiplying 512479879129 by its sum of digits (64), we get a square (32798712264256 = 5727016²).

The spelling of 512479879129 in words is "five hundred twelve billion, four hundred seventy-nine million, eight hundred seventy-nine thousand, one hundred twenty-nine".