130879993 has 2 divisors, whose sum is σ = 130879994. Its totient is φ = 130879992.

The previous prime is 130879981. The next prime is 130880017. The reversal of 130879993 is 399978031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126607504 + 4272489 = 11252^2 + 2067^2 .

It is an emirp because it is prime and its reverse (399978031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130879993 is a prime.

It is not a weakly prime, because it can be changed into another prime (130879943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65439996 + 65439997.

It is an arithmetic number, because the mean of its divisors is an integer number (65439997).

Almost surely, 2^130879993 is an apocalyptic number.

It is an amenable number.

130879993 is a deficient number, since it is larger than the sum of its proper divisors (1).

130879993 is an equidigital number, since it uses as much as digits as its factorization.

130879993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 130879993 is about 11440.2794109235. The cubic root of 130879993 is about 507.7201749561.

The spelling of 130879993 in words is "one hundred thirty million, eight hundred seventy-nine thousand, nine hundred ninety-three".