172316986 has 8 divisors (see below), whose sum is σ = 258552864. Its totient is φ = 86132700.

The previous prime is 172316983. The next prime is 172316987. The reversal of 172316986 is 689613271.

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

It is a super-3 number, since 3×172316986³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (172316983) 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 3 ways as a sum of consecutive naturals, for example, 3040 + ... + 18811.

It is an arithmetic number, because the mean of its divisors is an integer number (32319108).

Almost surely, 2^172316986 is an apocalyptic number.

172316986 is a deficient number, since it is larger than the sum of its proper divisors (86235878).

172316986 is a wasteful number, since it uses less digits than its factorization.

172316986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25796.

The product of its digits is 108864, while the sum is 43.

The square root of 172316986 is about 13126.9564637048. The cubic root of 172316986 is about 556.4712052753.

The spelling of 172316986 in words is "one hundred seventy-two million, three hundred sixteen thousand, nine hundred eighty-six".