131699999 has 2 divisors, whose sum is σ = 131700000. Its totient is φ = 131699998.

The previous prime is 131699989. The next prime is 131700007. The reversal of 131699999 is 999996131.

It is a strong prime.

It is an emirp because it is prime and its reverse (999996131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131699999 is a prime.

131699999 is a modest number, since divided by 99999 gives 1316 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131699989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65849999 + 65850000.

It is an arithmetic number, because the mean of its divisors is an integer number (65850000).

Almost surely, 2^131699999 is an apocalyptic number.

131699999 is a deficient number, since it is larger than the sum of its proper divisors (1).

131699999 is an equidigital number, since it uses as much as digits as its factorization.

131699999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1062882, while the sum is 56.

The square root of 131699999 is about 11476.0619987869. The cubic root of 131699999 is about 508.7783125303.

The spelling of 131699999 in words is "one hundred thirty-one million, six hundred ninety-nine thousand, nine hundred ninety-nine".