131446491 has 8 divisors (see below), whose sum is σ = 191194944. Its totient is φ = 79664520.

The previous prime is 131446487. The next prime is 131446547. The reversal of 131446491 is 194644131.

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

It is not a de Polignac number, because 131446491 - 2² = 131446487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 3983227 = 131446491 / (1 + 3 + 1 + 4 + 4 + 6 + 4 + 9 + 1).

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (131446411) 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 7 ways as a sum of consecutive naturals, for example, 1991581 + ... + 1991646.

It is an arithmetic number, because the mean of its divisors is an integer number (23899368).

Almost surely, 2^131446491 is an apocalyptic number.

131446491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131446491 is a deficient number, since it is larger than the sum of its proper divisors (59748453).

131446491 is a wasteful number, since it uses less digits than its factorization.

131446491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983241.

The product of its digits is 10368, while the sum is 33.

The square root of 131446491 is about 11465.0116005175. The cubic root of 131446491 is about 508.4516554331.

The spelling of 131446491 in words is "one hundred thirty-one million, four hundred forty-six thousand, four hundred ninety-one".