129277313 has 4 divisors (see below), whose sum is σ = 141029808. Its totient is φ = 117524820.

The previous prime is 129277303. The next prime is 129277339. The reversal of 129277313 is 313772921.

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 a cyclic number.

It is not a de Polignac number, because 129277313 - 2²⁴ = 112500097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129277303) 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, 5876231 + ... + 5876252.

It is an arithmetic number, because the mean of its divisors is an integer number (35257452).

Almost surely, 2^129277313 is an apocalyptic number.

It is an amenable number.

129277313 is a deficient number, since it is larger than the sum of its proper divisors (11752495).

129277313 is a wasteful number, since it uses less digits than its factorization.

129277313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11752494.

The product of its digits is 15876, while the sum is 35.

The square root of 129277313 is about 11370.0181618149. The cubic root of 129277313 is about 505.6392427701.

The spelling of 129277313 in words is "one hundred twenty-nine million, two hundred seventy-seven thousand, three hundred thirteen".