130997257 has 4 divisors (see below), whose sum is σ = 138702996. Its totient is φ = 123291520.

The previous prime is 130997219. The next prime is 130997309. The reversal of 130997257 is 752799031.

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 53275401 + 77721856 = 7299^2 + 8816^2 .

It is a cyclic number.

It is not a de Polignac number, because 130997257 - 2⁷ = 130997129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130997557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3852844 + ... + 3852877.

It is an arithmetic number, because the mean of its divisors is an integer number (34675749).

Almost surely, 2^130997257 is an apocalyptic number.

130997257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

130997257 is a deficient number, since it is larger than the sum of its proper divisors (7705739).

130997257 is an equidigital number, since it uses as much as digits as its factorization.

130997257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7705738.

The product of its (nonzero) digits is 119070, while the sum is 43.

The square root of 130997257 is about 11445.4033131209. The cubic root of 130997257 is about 507.8717629998.

The spelling of 130997257 in words is "one hundred thirty million, nine hundred ninety-seven thousand, two hundred fifty-seven".