131659999 has 2 divisors, whose sum is σ = 131660000. Its totient is φ = 131659998.

The previous prime is 131659993. The next prime is 131660017. The reversal of 131659999 is 999956131.

131659999 is nontrivially palindromic in base 2.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131659999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131659993) 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 as a sum of consecutive naturals, namely, 65829999 + 65830000.

It is an arithmetic number, because the mean of its divisors is an integer number (65830000).

Almost surely, 2^131659999 is an apocalyptic number.

131659999 is a deficient number, since it is larger than the sum of its proper divisors (1).

131659999 is an equidigital number, since it uses as much as digits as its factorization.

131659999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 590490, while the sum is 52.

The square root of 131659999 is about 11474.3191083393. The cubic root of 131659999 is about 508.7267985000.

The spelling of 131659999 in words is "one hundred thirty-one million, six hundred fifty-nine thousand, nine hundred ninety-nine".