131391902 has 8 divisors (see below), whose sum is σ = 197722512. Its totient is φ = 65484400.

The previous prime is 131391901. The next prime is 131391917. The reversal of 131391902 is 209193131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×131391902² = 34527663822355208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131391901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104999 + ... + 106242.

It is an arithmetic number, because the mean of its divisors is an integer number (24715314).

Almost surely, 2^131391902 is an apocalyptic number.

131391902 is a deficient number, since it is larger than the sum of its proper divisors (66330610).

131391902 is a wasteful number, since it uses less digits than its factorization.

131391902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211554.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 131391902 is about 11462.6306753729. The cubic root of 131391902 is about 508.3812599681.

The spelling of 131391902 in words is "one hundred thirty-one million, three hundred ninety-one thousand, nine hundred two".