131205947 has 4 divisors (see below), whose sum is σ = 135730320. Its totient is φ = 126681576.

The previous prime is 131205929. The next prime is 131205979. The reversal of 131205947 is 749502131.

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 131205947 - 2⁶ = 131205883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131205917) 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, 2262143 + ... + 2262200.

It is an arithmetic number, because the mean of its divisors is an integer number (33932580).

Almost surely, 2^131205947 is an apocalyptic number.

131205947 is a deficient number, since it is larger than the sum of its proper divisors (4524373).

131205947 is an equidigital number, since it uses as much as digits as its factorization.

131205947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524372.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 131205947 is about 11454.5164454900. The cubic root of 131205947 is about 508.1413145101.

The spelling of 131205947 in words is "one hundred thirty-one million, two hundred five thousand, nine hundred forty-seven".