130232981 has 2 divisors, whose sum is σ = 130232982. Its totient is φ = 130232980.

The previous prime is 130232959. The next prime is 130232983. The reversal of 130232981 is 189232031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115906756 + 14326225 = 10766^2 + 3785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130232981 is a prime.

It is a super-2 number, since 2×130232981² = 33921258680292722, which contains 22 as substring.

Together with 130232983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130232983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65116490 + 65116491.

It is an arithmetic number, because the mean of its divisors is an integer number (65116491).

Almost surely, 2^130232981 is an apocalyptic number.

It is an amenable number.

130232981 is a deficient number, since it is larger than the sum of its proper divisors (1).

130232981 is an equidigital number, since it uses as much as digits as its factorization.

130232981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 130232981 is about 11411.9665702279. The cubic root of 130232981 is about 506.8821455254.

The spelling of 130232981 in words is "one hundred thirty million, two hundred thirty-two thousand, nine hundred eighty-one".