131870047961 has 2 divisors, whose sum is σ = 131870047962. Its totient is φ = 131870047960.

The previous prime is 131870047951. The next prime is 131870048021. The reversal of 131870047961 is 169740078131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131478760000 + 391287961 = 362600^2 + 19781^2 .

It is a cyclic number.

It is not a de Polignac number, because 131870047961 - 2¹⁰ = 131870046937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (131870047951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65935023980 + 65935023981.

It is an arithmetic number, because the mean of its divisors is an integer number (65935023981).

Almost surely, 2^131870047961 is an apocalyptic number.

It is an amenable number.

131870047961 is a deficient number, since it is larger than the sum of its proper divisors (1).

131870047961 is an equidigital number, since it uses as much as digits as its factorization.

131870047961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 131870047961 in words is "one hundred thirty-one billion, eight hundred seventy million, forty-seven thousand, nine hundred sixty-one".