172997967 has 16 divisors (see below), whose sum is σ = 244609632. Its totient is φ = 108380160.

The previous prime is 172997941. The next prime is 172997969. The reversal of 172997967 is 769799271.

It is not a de Polignac number, because 172997967 - 2⁸ = 172997711 is a prime.

It is a super-2 number, since 2×172997967² = 59856593172266178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172997969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36367 + ... + 40847.

It is an arithmetic number, because the mean of its divisors is an integer number (15288102).

Almost surely, 2^172997967 is an apocalyptic number.

172997967 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

172997967 is a deficient number, since it is larger than the sum of its proper divisors (71611665).

172997967 is a wasteful number, since it uses less digits than its factorization.

172997967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5258.

The product of its digits is 3000564, while the sum is 57.

The square root of 172997967 is about 13152.8691546750. The cubic root of 172997967 is about 557.2032828892.

The spelling of 172997967 in words is "one hundred seventy-two million, nine hundred ninety-seven thousand, nine hundred sixty-seven".