131697939 has 8 divisors (see below), whose sum is σ = 175675392.
Its totient is φ = 87759560.
The previous prime is 131697893. The next prime is 131697983. The reversal of 131697939 is 939796131.
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 131697939 - 217 = 131566867 is a prime.
It is not an unprimeable number, because it can be changed into a prime (131697239) 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, 699 + ... + 16244.
It is an arithmetic number, because the mean of its divisors is an integer number (21959424).
Almost surely, 2131697939 is an apocalyptic number.
131697939 is a deficient number, since it is larger than the sum of its proper divisors (43977453).
131697939 is a wasteful number, since it uses less digits than its factorization.
131697939 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 19537.
The product of its digits is 275562, while the sum is 48.
The square root of 131697939 is about 11475.9722463938.
The cubic root of 131697939 is about 508.7756598125.
The spelling of 131697939 in words is "one hundred thirty-one million, six hundred ninety-seven thousand, nine hundred thirty-nine".