131937818 has 4 divisors (see below), whose sum is σ = 197906730. Its totient is φ = 65968908.

The previous prime is 131937811. The next prime is 131937853. The reversal of 131937818 is 818739131.

131937818 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 66699889 + 65237929 = 8167^2 + 8077^2 .

It is a super-2 number, since 2×131937818² = 34815175637202248, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131937811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32984453 + ... + 32984456.

Almost surely, 2^131937818 is an apocalyptic number.

131937818 is a deficient number, since it is larger than the sum of its proper divisors (65968912).

131937818 is an equidigital number, since it uses as much as digits as its factorization.

131937818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65968911.

The product of its digits is 36288, while the sum is 41.

The square root of 131937818 is about 11486.4188501029. The cubic root of 131937818 is about 509.0843727496.

The spelling of 131937818 in words is "one hundred thirty-one million, nine hundred thirty-seven thousand, eight hundred eighteen".