130978693 has 4 divisors (see below), whose sum is σ = 138683340. Its totient is φ = 123274048.

The previous prime is 130978691. The next prime is 130978697. The reversal of 130978693 is 396879031.

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 112848129 + 18130564 = 10623^2 + 4258^2 .

It is a cyclic number.

It is not a de Polignac number, because 130978693 - 2¹ = 130978691 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130978691) 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, 3852298 + ... + 3852331.

It is an arithmetic number, because the mean of its divisors is an integer number (34670835).

Almost surely, 2^130978693 is an apocalyptic number.

It is an amenable number.

130978693 is a deficient number, since it is larger than the sum of its proper divisors (7704647).

130978693 is an equidigital number, since it uses as much as digits as its factorization.

130978693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7704646.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 130978693 is about 11444.5923037913. The cubic root of 130978693 is about 507.8477712079.

The spelling of 130978693 in words is "one hundred thirty million, nine hundred seventy-eight thousand, six hundred ninety-three".