172289474 has 16 divisors (see below), whose sum is σ = 298116288. Its totient is φ = 73147632.

The previous prime is 172289471. The next prime is 172289477. The reversal of 172289474 is 474982271.

It is an interprime number because it is at equal distance from previous prime (172289471) and next prime (172289477).

It is not an unprimeable number, because it can be changed into a prime (172289471) 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 7 ways as a sum of consecutive naturals, for example, 56009 + ... + 59004.

It is an arithmetic number, because the mean of its divisors is an integer number (18632268).

Almost surely, 2^172289474 is an apocalyptic number.

172289474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

172289474 is a deficient number, since it is larger than the sum of its proper divisors (125826814).

172289474 is a wasteful number, since it uses less digits than its factorization.

172289474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115129.

The product of its digits is 225792, while the sum is 44.

The square root of 172289474 is about 13125.9085018905. The cubic root of 172289474 is about 556.4415884414.

The spelling of 172289474 in words is "one hundred seventy-two million, two hundred eighty-nine thousand, four hundred seventy-four".