131205479 has 2 divisors, whose sum is σ = 131205480. Its totient is φ = 131205478.

The previous prime is 131205467. The next prime is 131205493. The reversal of 131205479 is 974502131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131205479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131205419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65602739 + 65602740.

It is an arithmetic number, because the mean of its divisors is an integer number (65602740).

Almost surely, 2^131205479 is an apocalyptic number.

131205479 is a deficient number, since it is larger than the sum of its proper divisors (1).

131205479 is an equidigital number, since it uses as much as digits as its factorization.

131205479 is an evil number, because the sum of its binary digits is even.

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

The square root of 131205479 is about 11454.4960168486. The cubic root of 131205479 is about 508.1407103444.

The spelling of 131205479 in words is "one hundred thirty-one million, two hundred five thousand, four hundred seventy-nine".