131930881 has 2 divisors, whose sum is σ = 131930882. Its totient is φ = 131930880.

The previous prime is 131930879. The next prime is 131930899. The reversal of 131930881 is 188039131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114832656 + 17098225 = 10716^2 + 4135^2 .

It is a cyclic number.

It is not a de Polignac number, because 131930881 - 2¹ = 131930879 is a prime.

It is a super-2 number, since 2×131930881² = 34811514722872322, which contains 22 as substring.

Together with 131930879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (131930801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65965440 + 65965441.

It is an arithmetic number, because the mean of its divisors is an integer number (65965441).

Almost surely, 2^131930881 is an apocalyptic number.

It is an amenable number.

131930881 is a deficient number, since it is larger than the sum of its proper divisors (1).

131930881 is an equidigital number, since it uses as much as digits as its factorization.

131930881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 131930881 is about 11486.1168808262. The cubic root of 131930881 is about 509.0754504148.

The spelling of 131930881 in words is "one hundred thirty-one million, nine hundred thirty thousand, eight hundred eighty-one".