131994693257 has 8 divisors (see below), whose sum is σ = 159724670976. Its totient is φ = 106483113792.

The previous prime is 131994693203. The next prime is 131994693289. The reversal of 131994693257 is 752396499131.

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

It is not a de Polignac number, because 131994693257 - 2³² = 127699725961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131994693196 and 131994693205.

It is not an unprimeable number, because it can be changed into a prime (131994663257) 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, 554599433 + ... + 554599670.

It is an arithmetic number, because the mean of its divisors is an integer number (19965583872).

Almost surely, 2^131994693257 is an apocalyptic number.

131994693257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

131994693257 is a deficient number, since it is larger than the sum of its proper divisors (27729977719).

131994693257 is a wasteful number, since it uses less digits than its factorization.

131994693257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109199127.

The product of its digits is 11022480, while the sum is 59.

The spelling of 131994693257 in words is "one hundred thirty-one billion, nine hundred ninety-four million, six hundred ninety-three thousand, two hundred fifty-seven".