131990942 has 4 divisors (see below), whose sum is σ = 197986416. Its totient is φ = 65995470.

The previous prime is 131990927. The next prime is 131990953. The reversal of 131990942 is 249099131.

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

It is a junction number, because it is equal to n+sod(n) for n = 131990896 and 131990905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32997734 + ... + 32997737.

It is an arithmetic number, because the mean of its divisors is an integer number (49496604).

Almost surely, 2^131990942 is an apocalyptic number.

131990942 is a deficient number, since it is larger than the sum of its proper divisors (65995474).

131990942 is an equidigital number, since it uses as much as digits as its factorization.

131990942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65995473.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 131990942 is about 11488.7310874613. The cubic root of 131990942 is about 509.1526902082.

The spelling of 131990942 in words is "one hundred thirty-one million, nine hundred ninety thousand, nine hundred forty-two".