131909047 has 4 divisors (see below), whose sum is σ = 132123456. Its totient is φ = 131694640.

The previous prime is 131909017. The next prime is 131909051. The reversal of 131909047 is 740909131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131909047 - 2¹⁵ = 131876279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131909017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106279 + ... + 107512.

It is an arithmetic number, because the mean of its divisors is an integer number (33030864).

Almost surely, 2^131909047 is an apocalyptic number.

131909047 is a deficient number, since it is larger than the sum of its proper divisors (214409).

131909047 is an equidigital number, since it uses as much as digits as its factorization.

131909047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214408.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 131909047 is about 11485.1663897394. The cubic root of 131909047 is about 509.0473655910.

The spelling of 131909047 in words is "one hundred thirty-one million, nine hundred nine thousand, forty-seven".