172318474 has 4 divisors (see below), whose sum is σ = 258477714. Its totient is φ = 86159236.

The previous prime is 172318459. The next prime is 172318483. The reversal of 172318474 is 474813271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 474813271 = 16187 ⋅29333.

It can be written as a sum of positive squares in only one way, i.e., 168870025 + 3448449 = 12995^2 + 1857^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 43079617 + ... + 43079620.

Almost surely, 2^172318474 is an apocalyptic number.

172318474 is a deficient number, since it is larger than the sum of its proper divisors (86159240).

172318474 is an equidigital number, since it uses as much as digits as its factorization.

172318474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86159239.

The product of its digits is 37632, while the sum is 37.

The square root of 172318474 is about 13127.0131408481. The cubic root of 172318474 is about 556.4728070264.

The spelling of 172318474 in words is "one hundred seventy-two million, three hundred eighteen thousand, four hundred seventy-four".