131663699 has 2 divisors, whose sum is σ = 131663700. Its totient is φ = 131663698.

The previous prime is 131663689. The next prime is 131663717. The reversal of 131663699 is 996366131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131663699 is a prime.

It is not a weakly prime, because it can be changed into another prime (131663639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65831849 + 65831850.

It is an arithmetic number, because the mean of its divisors is an integer number (65831850).

Almost surely, 2^131663699 is an apocalyptic number.

131663699 is a deficient number, since it is larger than the sum of its proper divisors (1).

131663699 is an equidigital number, since it uses as much as digits as its factorization.

131663699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 44.

The square root of 131663699 is about 11474.4803368170. The cubic root of 131663699 is about 508.7315639857.

The spelling of 131663699 in words is "one hundred thirty-one million, six hundred sixty-three thousand, six hundred ninety-nine".