130013981 has 2 divisors, whose sum is σ = 130013982. Its totient is φ = 130013980.

The previous prime is 130013971. The next prime is 130014019. The reversal of 130013981 is 189310031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107536900 + 22477081 = 10370^2 + 4741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130013981 is a prime.

It is a super-2 number, since 2×130013981² = 33807270510936722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 130013981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130013921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65006990 + 65006991.

It is an arithmetic number, because the mean of its divisors is an integer number (65006991).

Almost surely, 2^130013981 is an apocalyptic number.

It is an amenable number.

130013981 is a deficient number, since it is larger than the sum of its proper divisors (1).

130013981 is an equidigital number, since it uses as much as digits as its factorization.

130013981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 130013981 is about 11402.3673419163. The cubic root of 130013981 is about 506.5978614920.

The spelling of 130013981 in words is "one hundred thirty million, thirteen thousand, nine hundred eighty-one".