172312713 has 6 divisors (see below), whose sum is σ = 248896154. Its totient is φ = 114875136.

The previous prime is 172312703. The next prime is 172312727. The reversal of 172312713 is 317213271.

It can be written as a sum of positive squares in only one way, i.e., 149157369 + 23155344 = 12213^2 + 4812^2 .

It is not a de Polignac number, because 172312713 - 2⁶ = 172312649 is a prime.

It is a super-2 number, since 2×172312713² = 59383342122840738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172312703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9572920 + ... + 9572937.

Almost surely, 2^172312713 is an apocalyptic number.

It is an amenable number.

172312713 is a deficient number, since it is larger than the sum of its proper divisors (76583441).

172312713 is a wasteful number, since it uses less digits than its factorization.

172312713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19145863 (or 19145860 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 172312713 is about 13126.7937060045. The cubic root of 172312713 is about 556.4666055719.

Adding to 172312713 its reverse (317213271), we get a palindrome (489525984).

The spelling of 172312713 in words is "one hundred seventy-two million, three hundred twelve thousand, seven hundred thirteen".