131973864 has 64 divisors (see below), whose sum is σ = 361152000. Its totient is φ = 39856320.

The previous prime is 131973841. The next prime is 131973871. The reversal of 131973864 is 468379131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99397 + ... + 100715.

It is an arithmetic number, because the mean of its divisors is an integer number (5643000).

Almost surely, 2^131973864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131973864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180576000).

131973864 is an abundant number, since it is smaller than the sum of its proper divisors (229178136).

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

131973864 is a wasteful number, since it uses less digits than its factorization.

131973864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718 (or 1714 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 131973864 is about 11487.9878133640. The cubic root of 131973864 is about 509.1307299015.

The spelling of 131973864 in words is "one hundred thirty-one million, nine hundred seventy-three thousand, eight hundred sixty-four".