617172625 has 8 divisors (see below), whose sum is σ = 770231592. Its totient is φ = 493738000.

The previous prime is 617172623. The next prime is 617172637. The reversal of 617172625 is 526271716.

It can be written as a sum of positive squares in 4 ways, for example, as 97344 + 617075281 = 312^2 + 24841^2 .

It is not a de Polignac number, because 617172625 - 2¹ = 617172623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617172623) 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 7 ways as a sum of consecutive naturals, for example, 2468566 + ... + 2468815.

It is an arithmetic number, because the mean of its divisors is an integer number (96278949).

Almost surely, 2^617172625 is an apocalyptic number.

It is an amenable number.

617172625 is a deficient number, since it is larger than the sum of its proper divisors (153058967).

617172625 is an equidigital number, since it uses as much as digits as its factorization.

617172625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4937396 (or 4937386 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 617172625 is about 24842.9592641456. The cubic root of 617172625 is about 851.4037358820.

Subtracting from 617172625 its reverse (526271716), we obtain a palindrome (90900909).

The spelling of 617172625 in words is "six hundred seventeen million, one hundred seventy-two thousand, six hundred twenty-five".