131240477 has 2 divisors, whose sum is σ = 131240478. Its totient is φ = 131240476.

The previous prime is 131240449. The next prime is 131240479. The reversal of 131240477 is 774042131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86229796 + 45010681 = 9286^2 + 6709^2 .

It is a cyclic number.

It is not a de Polignac number, because 131240477 - 2⁶ = 131240413 is a prime.

Together with 131240479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131240479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65620238 + 65620239.

It is an arithmetic number, because the mean of its divisors is an integer number (65620239).

Almost surely, 2^131240477 is an apocalyptic number.

It is an amenable number.

131240477 is a deficient number, since it is larger than the sum of its proper divisors (1).

131240477 is an equidigital number, since it uses as much as digits as its factorization.

131240477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 131240477 is about 11456.0236120567. The cubic root of 131240477 is about 508.1858871355.

The spelling of 131240477 in words is "one hundred thirty-one million, two hundred forty thousand, four hundred seventy-seven".