131458981 has 2 divisors, whose sum is σ = 131458982. Its totient is φ = 131458980.

The previous prime is 131458933. The next prime is 131459051. The reversal of 131458981 is 189854131.

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., 130896481 + 562500 = 11441^2 + 750^2 .

It is an emirp because it is prime and its reverse (189854131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131458981 - 2¹³ = 131450789 is a prime.

It is a super-2 number, since 2×131458981² = 34562927371116722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131458931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65729490 + 65729491.

It is an arithmetic number, because the mean of its divisors is an integer number (65729491).

Almost surely, 2^131458981 is an apocalyptic number.

It is an amenable number.

131458981 is a deficient number, since it is larger than the sum of its proper divisors (1).

131458981 is an equidigital number, since it uses as much as digits as its factorization.

131458981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 40.

The square root of 131458981 is about 11465.5562882923. The cubic root of 131458981 is about 508.4677592231.

The spelling of 131458981 in words is "one hundred thirty-one million, four hundred fifty-eight thousand, nine hundred eighty-one".