131617491 has 8 divisors (see below), whose sum is σ = 175687104. Its totient is φ = 87646440.

The previous prime is 131617483. The next prime is 131617501. The reversal of 131617491 is 194716131.

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

It is not a de Polignac number, because 131617491 - 2³ = 131617483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131617481) 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, 21465 + ... + 26906.

It is an arithmetic number, because the mean of its divisors is an integer number (21960888).

Almost surely, 2^131617491 is an apocalyptic number.

131617491 is a deficient number, since it is larger than the sum of its proper divisors (44069613).

131617491 is an equidigital number, since it uses as much as digits as its factorization.

131617491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49281.

The product of its digits is 4536, while the sum is 33.

The square root of 131617491 is about 11472.4666484588. The cubic root of 131617491 is about 508.6720431032.

The spelling of 131617491 in words is "one hundred thirty-one million, six hundred seventeen thousand, four hundred ninety-one".