131906647 has 4 divisors (see below), whose sum is σ = 132221880. Its totient is φ = 131591416.

The previous prime is 131906639. The next prime is 131906699. The reversal of 131906647 is 746609131.

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 131906647 - 2³ = 131906639 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 (131906617) 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, 156988 + ... + 157825.

It is an arithmetic number, because the mean of its divisors is an integer number (33055470).

Almost surely, 2^131906647 is an apocalyptic number.

131906647 is a deficient number, since it is larger than the sum of its proper divisors (315233).

131906647 is an equidigital number, since it uses as much as digits as its factorization.

131906647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315232.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 131906647 is about 11485.0619066682. The cubic root of 131906647 is about 509.0442783095.

The spelling of 131906647 in words is "one hundred thirty-one million, nine hundred six thousand, six hundred forty-seven".