131973336 has 96 divisors (see below), whose sum is σ = 391968720. Its totient is φ = 39782400.

The previous prime is 131973319. The next prime is 131973337. The reversal of 131973336 is 633379131.

131973336 is a `hidden beast` number, since 1 + 319 + 7 + 3 + 336 = 666.

It is a super-2 number, since 2×131973336² = 34833922829937792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 131973336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131973337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222256 + ... + 222848.

Almost surely, 2^131973336 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 131973336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195984360).

131973336 is an abundant number, since it is smaller than the sum of its proper divisors (259995384).

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

131973336 is a wasteful number, since it uses less digits than its factorization.

131973336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897 (or 890 counting only the distinct ones).

The product of its digits is 30618, while the sum is 36.

The square root of 131973336 is about 11487.9648328153. The cubic root of 131973336 is about 509.1300509252.

The spelling of 131973336 in words is "one hundred thirty-one million, nine hundred seventy-three thousand, three hundred thirty-six".