130693257 has 10 divisors (see below), whose sum is σ = 195233258. Its totient is φ = 87128784.

The previous prime is 130693253. The next prime is 130693259. The reversal of 130693257 is 752396031.

It can be written as a sum of positive squares in only one way, i.e., 130439241 + 254016 = 11421^2 + 504^2 .

It is not a de Polignac number, because 130693257 - 2² = 130693253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130693253) 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 9 ways as a sum of consecutive naturals, for example, 806668 + ... + 806829.

Almost surely, 2^130693257 is an apocalyptic number.

It is an amenable number.

130693257 is a deficient number, since it is larger than the sum of its proper divisors (64540001).

130693257 is an equidigital number, since it uses as much as digits as its factorization.

130693257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613509 (or 1613500 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 130693257 is about 11432.1151586222. The cubic root of 130693257 is about 507.4785929317.

The spelling of 130693257 in words is "one hundred thirty million, six hundred ninety-three thousand, two hundred fifty-seven".