129168513 has 20 divisors (see below), whose sum is σ = 193847808. Its totient is φ = 85714200.

The previous prime is 129168511. The next prime is 129168553. The reversal of 129168513 is 315861921.

129168513 is a `hidden beast` number, since 129 + 16 + 8 + 513 = 666.

It is not a de Polignac number, because 129168513 - 2¹ = 129168511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129168511) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14488 + ... + 21638.

Almost surely, 2^129168513 is an apocalyptic number.

It is an amenable number.

129168513 is a deficient number, since it is larger than the sum of its proper divisors (64679295).

129168513 is an equidigital number, since it uses as much as digits as its factorization.

129168513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7386 (or 7377 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 129168513 is about 11365.2326417016. The cubic root of 129168513 is about 505.4973540176.

The spelling of 129168513 in words is "one hundred twenty-nine million, one hundred sixty-eight thousand, five hundred thirteen".