131860681 has 2 divisors, whose sum is σ = 131860682. Its totient is φ = 131860680.

The previous prime is 131860669. The next prime is 131860691. The reversal of 131860681 is 186068131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123543225 + 8317456 = 11115^2 + 2884^2 .

It is an emirp because it is prime and its reverse (186068131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131860681 - 2¹³ = 131852489 is a prime.

It is a super-2 number, since 2×131860681² = 34774478387567522, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 131860681 parts by 16239 straight cuts.

It is not a weakly prime, because it can be changed into another prime (131860601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65930340 + 65930341.

It is an arithmetic number, because the mean of its divisors is an integer number (65930341).

Almost surely, 2^131860681 is an apocalyptic number.

It is an amenable number.

131860681 is a deficient number, since it is larger than the sum of its proper divisors (1).

131860681 is an equidigital number, since it uses as much as digits as its factorization.

131860681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 131860681 is about 11483.0606111785. The cubic root of 131860681 is about 508.9851419220.

The spelling of 131860681 in words is "one hundred thirty-one million, eight hundred sixty thousand, six hundred eighty-one".