131686699 has 2 divisors, whose sum is σ = 131686700. Its totient is φ = 131686698.

The previous prime is 131686673. The next prime is 131686703. The reversal of 131686699 is 996686131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131686699 is a prime.

It is not a weakly prime, because it can be changed into another prime (131686649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65843349 + 65843350.

It is an arithmetic number, because the mean of its divisors is an integer number (65843350).

Almost surely, 2^131686699 is an apocalyptic number.

131686699 is a deficient number, since it is larger than the sum of its proper divisors (1).

131686699 is an equidigital number, since it uses as much as digits as its factorization.

131686699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 49.

The square root of 131686699 is about 11475.4825170883. The cubic root of 131686699 is about 508.7611852729.

The spelling of 131686699 in words is "one hundred thirty-one million, six hundred eighty-six thousand, six hundred ninety-nine".