131993946 has 48 divisors (see below), whose sum is σ = 333528000. Its totient is φ = 37710792.

The previous prime is 131993929. The next prime is 131993947. The reversal of 131993946 is 649399131.

It is not an unprimeable number, because it can be changed into a prime (131993947) 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, 4516 + ... + 16863.

It is an arithmetic number, because the mean of its divisors is an integer number (6948500).

Almost surely, 2^131993946 is an apocalyptic number.

131993946 is an abundant number, since it is smaller than the sum of its proper divisors (201534054).

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

131993946 is a wasteful number, since it uses less digits than its factorization.

131993946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21408 (or 21391 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 131993946 is about 11488.8618235228. The cubic root of 131993946 is about 509.1565528043.

The spelling of 131993946 in words is "one hundred thirty-one million, nine hundred ninety-three thousand, nine hundred forty-six".