130778915 has 4 divisors (see below), whose sum is σ = 156934704. Its totient is φ = 104623128.

The previous prime is 130778911. The next prime is 130778917. The reversal of 130778915 is 519877031.

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

It is a cyclic number.

It is not a de Polignac number, because 130778915 - 2² = 130778911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130778911) 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, 13077887 + ... + 13077896.

It is an arithmetic number, because the mean of its divisors is an integer number (39233676).

Almost surely, 2^130778915 is an apocalyptic number.

130778915 is a deficient number, since it is larger than the sum of its proper divisors (26155789).

130778915 is an equidigital number, since it uses as much as digits as its factorization.

130778915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26155788.

The product of its (nonzero) digits is 52920, while the sum is 41.

The square root of 130778915 is about 11435.8609208052. The cubic root of 130778915 is about 507.5894379973.

The spelling of 130778915 in words is "one hundred thirty million, seven hundred seventy-eight thousand, nine hundred fifteen".