131309193 has 8 divisors (see below), whose sum is σ = 175417056. Its totient is φ = 87370400.

The previous prime is 131309179. The next prime is 131309197. The reversal of 131309193 is 391903131.

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 131309193 - 2⁴ = 131309177 is a prime.

It is a super-2 number, since 2×131309193² = 34484208332622498, 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 131309193.

It is not an unprimeable number, because it can be changed into a prime (131309197) 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, 40443 + ... + 43568.

It is an arithmetic number, because the mean of its divisors is an integer number (21927132).

Almost surely, 2^131309193 is an apocalyptic number.

It is an amenable number.

131309193 is a deficient number, since it is larger than the sum of its proper divisors (44107863).

131309193 is an equidigital number, since it uses as much as digits as its factorization.

131309193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84535.

The product of its (nonzero) digits is 2187, while the sum is 30.

The square root of 131309193 is about 11459.0223404966. The cubic root of 131309193 is about 508.2745650834.

The spelling of 131309193 in words is "one hundred thirty-one million, three hundred nine thousand, one hundred ninety-three".