131699601 has 20 divisors (see below), whose sum is σ = 214623024. Its totient is φ = 79817400.

The previous prime is 131699597. The next prime is 131699609. The reversal of 131699601 is 106996131.

It is not a de Polignac number, because 131699601 - 2² = 131699597 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (131699609) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 73015 + ... + 74796.

Almost surely, 2^131699601 is an apocalyptic number.

131699601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131699601 is a deficient number, since it is larger than the sum of its proper divisors (82923423).

131699601 is a wasteful number, since it uses less digits than its factorization.

131699601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147834 (or 147825 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 131699601 is about 11476.0446583307. The cubic root of 131699601 is about 508.7778000171. Note that the first 3 decimals are identical.

The spelling of 131699601 in words is "one hundred thirty-one million, six hundred ninety-nine thousand, six hundred one".