130991593 has 8 divisors (see below), whose sum is σ = 131819688. Its totient is φ = 130166784.

The previous prime is 130991569. The next prime is 130991603. The reversal of 130991593 is 395199031.

It can be written as a sum of positive squares in 4 ways, for example, as 17952169 + 113039424 = 4237^2 + 10632^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130991593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130991533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152421 + ... + 153277.

It is an arithmetic number, because the mean of its divisors is an integer number (16477461).

Almost surely, 2^130991593 is an apocalyptic number.

It is an amenable number.

130991593 is a deficient number, since it is larger than the sum of its proper divisors (828095).

130991593 is an equidigital number, since it uses as much as digits as its factorization.

130991593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643.

The product of its (nonzero) digits is 32805, while the sum is 40.

The square root of 130991593 is about 11445.1558748669. The cubic root of 130991593 is about 507.8644431846.

The spelling of 130991593 in words is "one hundred thirty million, nine hundred ninety-one thousand, five hundred ninety-three".