9725658617 has 4 divisors (see below), whose sum is σ = 9726178176. Its totient is φ = 9725139060.

The previous prime is 9725658599. The next prime is 9725658619. The reversal of 9725658617 is 7168565279.

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 9725658617 - 2⁸ = 9725658361 is a prime.

It is a super-3 number, since 3×9725658617³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9725658619) 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, 230609 + ... + 269502.

It is an arithmetic number, because the mean of its divisors is an integer number (2431544544).

Almost surely, 2^9725658617 is an apocalyptic number.

It is an amenable number.

9725658617 is a deficient number, since it is larger than the sum of its proper divisors (519559).

9725658617 is a wasteful number, since it uses less digits than its factorization.

9725658617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519558.

The product of its digits is 6350400, while the sum is 56.

The square root of 9725658617 is about 98618.7538807908. The cubic root of 9725658617 is about 2134.5500401516.

The spelling of 9725658617 in words is "nine billion, seven hundred twenty-five million, six hundred fifty-eight thousand, six hundred seventeen".