130278817 has 4 divisors (see below), whose sum is σ = 134771220. Its totient is φ = 125786416.

The previous prime is 130278791. The next prime is 130278847. The reversal of 130278817 is 718872031.

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 27783441 + 102495376 = 5271^2 + 10124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130278817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130278847) 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, 2246158 + ... + 2246215.

It is an arithmetic number, because the mean of its divisors is an integer number (33692805).

Almost surely, 2^130278817 is an apocalyptic number.

It is an amenable number.

130278817 is a deficient number, since it is larger than the sum of its proper divisors (4492403).

130278817 is an equidigital number, since it uses as much as digits as its factorization.

130278817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4492402.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 130278817 is about 11413.9746363832. The cubic root of 130278817 is about 506.9416049257.

The spelling of 130278817 in words is "one hundred thirty million, two hundred seventy-eight thousand, eight hundred seventeen".