131697339 has 4 divisors (see below), whose sum is σ = 175596456. Its totient is φ = 87798224.

The previous prime is 131697311. The next prime is 131697359. The reversal of 131697339 is 933796131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933796131 = 3 ⋅311265377.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131697339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131697339.

It is not an unprimeable number, because it can be changed into a prime (131697359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21949554 + ... + 21949559.

It is an arithmetic number, because the mean of its divisors is an integer number (43899114).

Almost surely, 2^131697339 is an apocalyptic number.

131697339 is a deficient number, since it is larger than the sum of its proper divisors (43899117).

131697339 is an equidigital number, since it uses as much as digits as its factorization.

131697339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43899116.

The product of its digits is 91854, while the sum is 42.

The square root of 131697339 is about 11475.9461047880. The cubic root of 131697339 is about 508.7748871710.

The spelling of 131697339 in words is "one hundred thirty-one million, six hundred ninety-seven thousand, three hundred thirty-nine".