131973198 has 16 divisors (see below), whose sum is σ = 301653120. Its totient is φ = 37706616.

The previous prime is 131973181. The next prime is 131973203. The reversal of 131973198 is 891379131.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 3142219 = 131973198 / (1 + 3 + 1 + 9 + 7 + 3 + 1 + 9 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571068 + ... + 1571151.

It is an arithmetic number, because the mean of its divisors is an integer number (18853320).

Almost surely, 2^131973198 is an apocalyptic number.

131973198 is an abundant number, since it is smaller than the sum of its proper divisors (169679922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131973198 is a wasteful number, since it uses less digits than its factorization.

131973198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142231.

The product of its digits is 40824, while the sum is 42.

The square root of 131973198 is about 11487.9588265279. The cubic root of 131973198 is about 509.1298734652.

The spelling of 131973198 in words is "one hundred thirty-one million, nine hundred seventy-three thousand, one hundred ninety-eight".