129651513 has 4 divisors (see below), whose sum is σ = 172868688. Its totient is φ = 86434340.

The previous prime is 129651491. The next prime is 129651523. The reversal of 129651513 is 315156921.

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 129651513 - 2⁶ = 129651449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129651523) 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, 21608583 + ... + 21608588.

It is an arithmetic number, because the mean of its divisors is an integer number (43217172).

Almost surely, 2^129651513 is an apocalyptic number.

It is an amenable number.

129651513 is a deficient number, since it is larger than the sum of its proper divisors (43217175).

129651513 is an equidigital number, since it uses as much as digits as its factorization.

129651513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43217174.

The product of its digits is 8100, while the sum is 33.

The square root of 129651513 is about 11386.4618297345. The cubic root of 129651513 is about 506.1266392916.

The spelling of 129651513 in words is "one hundred twenty-nine million, six hundred fifty-one thousand, five hundred thirteen".