129926539 has 4 divisors (see below), whose sum is σ = 129966624. Its totient is φ = 129886456.

The previous prime is 129926527. The next prime is 129926543. The reversal of 129926539 is 935629921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935629921 = 13679 ⋅68399.

It is a cyclic number.

It is not a de Polignac number, because 129926539 - 2⁵ = 129926507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129926339) 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, 14707 + ... + 21820.

It is an arithmetic number, because the mean of its divisors is an integer number (32491656).

Almost surely, 2^129926539 is an apocalyptic number.

129926539 is a deficient number, since it is larger than the sum of its proper divisors (40085).

129926539 is an equidigital number, since it uses as much as digits as its factorization.

129926539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40084.

The product of its digits is 262440, while the sum is 46.

The square root of 129926539 is about 11398.5323178030. The cubic root of 129926539 is about 506.4842637990.

The spelling of 129926539 in words is "one hundred twenty-nine million, nine hundred twenty-six thousand, five hundred thirty-nine".