172874894 has 4 divisors (see below), whose sum is σ = 259312344. Its totient is φ = 86437446.

The previous prime is 172874873. The next prime is 172874899. The reversal of 172874894 is 498478271.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×172874894² = 59771457951022472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172874899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43218722 + ... + 43218725.

It is an arithmetic number, because the mean of its divisors is an integer number (64828086).

Almost surely, 2^172874894 is an apocalyptic number.

172874894 is a deficient number, since it is larger than the sum of its proper divisors (86437450).

172874894 is an equidigital number, since it uses as much as digits as its factorization.

172874894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86437449.

The product of its digits is 903168, while the sum is 50.

The square root of 172874894 is about 13148.1897613322. The cubic root of 172874894 is about 557.0711176595.

The spelling of 172874894 in words is "one hundred seventy-two million, eight hundred seventy-four thousand, eight hundred ninety-four".