130685978 has 8 divisors (see below), whose sum is σ = 196495860. Its totient is φ = 65187360.

The previous prime is 130685957. The next prime is 130685981. The reversal of 130685978 is 879586031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72880369 + 57805609 = 8537^2 + 7603^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 76763 + ... + 78446.

Almost surely, 2^130685978 is an apocalyptic number.

130685978 is a deficient number, since it is larger than the sum of its proper divisors (65809882).

130685978 is a wasteful number, since it uses less digits than its factorization.

130685978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155632.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 130685978 is about 11431.7967966545. The cubic root of 130685978 is about 507.4691713662.

The spelling of 130685978 in words is "one hundred thirty million, six hundred eighty-five thousand, nine hundred seventy-eight".