131909967 has 18 divisors (see below), whose sum is σ = 217906728. Its totient is φ = 75325032.

The previous prime is 131909963. The next prime is 131910001. The reversal of 131909967 is 769909131.

It is not a de Polignac number, because 131909967 - 2² = 131909963 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131909963) 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 17 ways as a sum of consecutive naturals, for example, 90438 + ... + 91884.

Almost surely, 2^131909967 is an apocalyptic number.

131909967 is a deficient number, since it is larger than the sum of its proper divisors (85996761).

131909967 is an frugal number, since it uses more digits than its factorization.

131909967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 131909967 is about 11485.2064413314. The cubic root of 131909967 is about 509.0485490390.

The spelling of 131909967 in words is "one hundred thirty-one million, nine hundred nine thousand, nine hundred sixty-seven".