131890929 has 4 divisors (see below), whose sum is σ = 175854576. Its totient is φ = 87927284.

The previous prime is 131890921. The next prime is 131890937. The reversal of 131890929 is 929098131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (131890921) and next prime (131890937).

It is a cyclic number.

It is not a de Polignac number, because 131890929 - 2³ = 131890921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131890921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21981819 + ... + 21981824.

It is an arithmetic number, because the mean of its divisors is an integer number (43963644).

Almost surely, 2^131890929 is an apocalyptic number.

It is an amenable number.

131890929 is a deficient number, since it is larger than the sum of its proper divisors (43963647).

131890929 is an equidigital number, since it uses as much as digits as its factorization.

131890929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43963646.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 131890929 is about 11484.3776061222. The cubic root of 131890929 is about 509.0240582625.

The spelling of 131890929 in words is "one hundred thirty-one million, eight hundred ninety thousand, nine hundred twenty-nine".