129560617 has 4 divisors (see below), whose sum is σ = 129680896. Its totient is φ = 129440340.

The previous prime is 129560609. The next prime is 129560657. The reversal of 129560617 is 716065921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 716065921 = 37 ⋅19353133.

It is a cyclic number.

It is not a de Polignac number, because 129560617 - 2³ = 129560609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129560657) 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, 58509 + ... + 60682.

It is an arithmetic number, because the mean of its divisors is an integer number (32420224).

Almost surely, 2^129560617 is an apocalyptic number.

It is an amenable number.

129560617 is a deficient number, since it is larger than the sum of its proper divisors (120279).

129560617 is a wasteful number, since it uses less digits than its factorization.

129560617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120278.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 129560617 is about 11382.4697232191. The cubic root of 129560617 is about 506.0083333263.

The spelling of 129560617 in words is "one hundred twenty-nine million, five hundred sixty thousand, six hundred seventeen".