130387993 has 2 divisors, whose sum is σ = 130387994. Its totient is φ = 130387992.

The previous prime is 130387967. The next prime is 130388023. The reversal of 130387993 is 399783031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80784144 + 49603849 = 8988^2 + 7043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130387993 is a prime.

It is not a weakly prime, because it can be changed into another prime (130387903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65193996 + 65193997.

It is an arithmetic number, because the mean of its divisors is an integer number (65193997).

Almost surely, 2^130387993 is an apocalyptic number.

It is an amenable number.

130387993 is a deficient number, since it is larger than the sum of its proper divisors (1).

130387993 is an equidigital number, since it uses as much as digits as its factorization.

130387993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 130387993 is about 11418.7561932112. The cubic root of 130387993 is about 507.0831741254.

The spelling of 130387993 in words is "one hundred thirty million, three hundred eighty-seven thousand, nine hundred ninety-three".