131679999 has 28 divisors (see below), whose sum is σ = 215390952. Its totient is φ = 79801200.

The previous prime is 131679973. The next prime is 131680009. The reversal of 131679999 is 999976131.

It is not a de Polignac number, because 131679999 - 2⁹ = 131679487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131679199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 192 + ... + 16229.

It is an arithmetic number, because the mean of its divisors is an integer number (7692534).

Almost surely, 2^131679999 is an apocalyptic number.

131679999 is a deficient number, since it is larger than the sum of its proper divisors (83710953).

131679999 is an equidigital number, since it uses as much as digits as its factorization.

131679999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16450 (or 16435 counting only the distinct ones).

The product of its digits is 826686, while the sum is 54.

The square root of 131679999 is about 11475.1905866526. The cubic root of 131679999 is about 508.7525568192.

The spelling of 131679999 in words is "one hundred thirty-one million, six hundred seventy-nine thousand, nine hundred ninety-nine".