130879981 has 2 divisors, whose sum is σ = 130879982. Its totient is φ = 130879980.

The previous prime is 130879963. The next prime is 130879993. The reversal of 130879981 is 189978031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86657481 + 44222500 = 9309^2 + 6650^2 .

It is a cyclic number.

It is not a de Polignac number, because 130879981 - 2¹¹ = 130877933 is a prime.

It is a super-2 number, since 2×130879981² = 34259138853120722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130879901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65439990 + 65439991.

It is an arithmetic number, because the mean of its divisors is an integer number (65439991).

Almost surely, 2^130879981 is an apocalyptic number.

It is an amenable number.

130879981 is a deficient number, since it is larger than the sum of its proper divisors (1).

130879981 is an equidigital number, since it uses as much as digits as its factorization.

130879981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 130879981 is about 11440.2788864608. The cubic root of 130879981 is about 507.7201594389.

The spelling of 130879981 in words is "one hundred thirty million, eight hundred seventy-nine thousand, nine hundred eighty-one".