131694399 has 6 divisors (see below), whose sum is σ = 190225256. Its totient is φ = 87796260.

The previous prime is 131694379. The next prime is 131694403. The reversal of 131694399 is 993496131.

It is not a de Polignac number, because 131694399 - 2⁷ = 131694271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131694349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7316347 + ... + 7316364.

Almost surely, 2^131694399 is an apocalyptic number.

131694399 is a deficient number, since it is larger than the sum of its proper divisors (58530857).

131694399 is a wasteful number, since it uses less digits than its factorization.

131694399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14632717 (or 14632714 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 131694399 is about 11475.8180100592. The cubic root of 131694399 is about 508.7711011940.

The spelling of 131694399 in words is "one hundred thirty-one million, six hundred ninety-four thousand, three hundred ninety-nine".