131906635 has 16 divisors (see below), whose sum is σ = 185314752. Its totient is φ = 88243200.

The previous prime is 131906629. The next prime is 131906639. The reversal of 131906635 is 536609131.

It is not a de Polignac number, because 131906635 - 2³ = 131906627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131906635.

It is not an unprimeable number, because it can be changed into a prime (131906639) 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 in 15 ways as a sum of consecutive naturals, for example, 44526 + ... + 47395.

It is an arithmetic number, because the mean of its divisors is an integer number (11582172).

Almost surely, 2^131906635 is an apocalyptic number.

131906635 is a deficient number, since it is larger than the sum of its proper divisors (53408117).

131906635 is an equidigital number, since it uses as much as digits as its factorization.

131906635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91974.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 131906635 is about 11485.0613842504. The cubic root of 131906635 is about 509.0442628730.

The spelling of 131906635 in words is "one hundred thirty-one million, nine hundred six thousand, six hundred thirty-five".