172308017 has 8 divisors (see below), whose sum is σ = 207288000. Its totient is φ = 139919184.

The previous prime is 172308007. The next prime is 172308023. The reversal of 172308017 is 710803271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172308017 - 2¹⁸ = 172045873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172308007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647642 + ... + 647907.

It is an arithmetic number, because the mean of its divisors is an integer number (25911000).

Almost surely, 2^172308017 is an apocalyptic number.

It is an amenable number.

172308017 is a deficient number, since it is larger than the sum of its proper divisors (34979983).

172308017 is a wasteful number, since it uses less digits than its factorization.

172308017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295575.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 172308017 is about 13126.6148339928. The cubic root of 172308017 is about 556.4615504391.

The spelling of 172308017 in words is "one hundred seventy-two million, three hundred eight thousand, seventeen".