130993 has 4 divisors (see below), whose sum is σ = 135540. Its totient is φ = 126448.

The previous prime is 130987. The next prime is 131009. The reversal of 130993 is 399031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23409 + 107584 = 153^2 + 328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2230 + ... + 2287.

It is an arithmetic number, because the mean of its divisors is an integer number (33885).

2¹³⁰⁹⁹³ is an apocalyptic number.

It is an amenable number.

130993 is a deficient number, since it is larger than the sum of its proper divisors (4547).

130993 is an equidigital number, since it uses as much as digits as its factorization.

130993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4546.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 130993 is about 361.9295511560. The cubic root of 130993 is about 50.7866261527.

The spelling of 130993 in words is "one hundred thirty thousand, nine hundred ninety-three".