131489931 has 8 divisors (see below), whose sum is σ = 175717440. Its totient is φ = 87461192.

The previous prime is 131489909. The next prime is 131489933. The reversal of 131489931 is 139984131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131489931 - 2¹⁵ = 131457163 is a prime.

It is a super-2 number, since 2×131489931² = 34579203908769522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131489931.

It is not an unprimeable number, because it can be changed into a prime (131489933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48141 + ... + 50798.

It is an arithmetic number, because the mean of its divisors is an integer number (21964680).

Almost surely, 2^131489931 is an apocalyptic number.

131489931 is a deficient number, since it is larger than the sum of its proper divisors (44227509).

131489931 is an equidigital number, since it uses as much as digits as its factorization.

131489931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99385.

The product of its digits is 23328, while the sum is 39.

The square root of 131489931 is about 11466.9059035121. The cubic root of 131489931 is about 508.5076597360.

The spelling of 131489931 in words is "one hundred thirty-one million, four hundred eighty-nine thousand, nine hundred thirty-one".