617972107 has 4 divisors (see below), whose sum is σ = 639281520. Its totient is φ = 596662696.

The previous prime is 617972099. The next prime is 617972129. The reversal of 617972107 is 701279716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 617972107 - 2³ = 617972099 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 617972107.

It is not an unprimeable number, because it can be changed into a prime (617970107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10654663 + ... + 10654720.

It is an arithmetic number, because the mean of its divisors is an integer number (159820380).

Almost surely, 2^617972107 is an apocalyptic number.

617972107 is a deficient number, since it is larger than the sum of its proper divisors (21309413).

617972107 is a wasteful number, since it uses less digits than its factorization.

617972107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21309412.

The product of its (nonzero) digits is 37044, while the sum is 40.

The square root of 617972107 is about 24859.0447724767. The cubic root of 617972107 is about 851.7712118134.

The spelling of 617972107 in words is "six hundred seventeen million, nine hundred seventy-two thousand, one hundred seven".