131170391 has 8 divisors (see below), whose sum is σ = 143193744. Its totient is φ = 119163520.

The previous prime is 131170363. The next prime is 131170409. The reversal of 131170391 is 193071131.

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 131170391 - 2¹⁴ = 131154007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131170391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131170301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17471 + ... + 23823.

It is an arithmetic number, because the mean of its divisors is an integer number (17899218).

Almost surely, 2^131170391 is an apocalyptic number.

131170391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131170391 is a deficient number, since it is larger than the sum of its proper divisors (12023353).

131170391 is a wasteful number, since it uses less digits than its factorization.

131170391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8241.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 131170391 is about 11452.9642887769. The cubic root of 131170391 is about 508.0954093122.

It can be divided in two parts, 131 and 170391, that multiplied together give a triangular number (22321221 = T₆₆₈₁).

The spelling of 131170391 in words is "one hundred thirty-one million, one hundred seventy thousand, three hundred ninety-one".