129313977 has 16 divisors (see below), whose sum is σ = 186251520. Its totient is φ = 79333632.

The previous prime is 129313969. The next prime is 129313979. The reversal of 129313977 is 779313921.

It is not a de Polignac number, because 129313977 - 2³ = 129313969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129313979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8224 + ... + 18062.

It is an arithmetic number, because the mean of its divisors is an integer number (11640720).

Almost surely, 2^129313977 is an apocalyptic number.

It is an amenable number.

129313977 is a deficient number, since it is larger than the sum of its proper divisors (56937543).

129313977 is a wasteful number, since it uses less digits than its factorization.

129313977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10192.

The product of its digits is 71442, while the sum is 42.

The square root of 129313977 is about 11371.6303580445. The cubic root of 129313977 is about 505.6870392588.

The spelling of 129313977 in words is "one hundred twenty-nine million, three hundred thirteen thousand, nine hundred seventy-seven".