172708994 has 4 divisors (see below), whose sum is σ = 259063494. Its totient is φ = 86354496.

The previous prime is 172708981. The next prime is 172708997. The reversal of 172708994 is 499807271.

172708994 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499807271 = 9463 ⋅52817.

It can be written as a sum of positive squares in only one way, i.e., 123498769 + 49210225 = 11113^2 + 7015^2 .

It is not an unprimeable number, because it can be changed into a prime (172708997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43177247 + ... + 43177250.

Almost surely, 2^172708994 is an apocalyptic number.

172708994 is a deficient number, since it is larger than the sum of its proper divisors (86354500).

172708994 is an equidigital number, since it uses as much as digits as its factorization.

172708994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86354499.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 172708994 is about 13141.8793937549. The cubic root of 172708994 is about 556.8928622071.

The spelling of 172708994 in words is "one hundred seventy-two million, seven hundred eight thousand, nine hundred ninety-four".