159427978 has 24 divisors (see below), whose sum is σ = 249699780. Its totient is φ = 76334400.

The previous prime is 159427969. The next prime is 159427979. The reversal of 159427978 is 879724951.

It can be written as a sum of positive squares in 2 ways, for example, as 148425489 + 11002489 = 12183^2 + 3317^2 .

It is not an unprimeable number, because it can be changed into a prime (159427979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209118 + ... + 209878.

Almost surely, 2^159427978 is an apocalyptic number.

159427978 is a deficient number, since it is larger than the sum of its proper divisors (90271802).

159427978 is a wasteful number, since it uses less digits than its factorization.

159427978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934 (or 903 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 52.

The square root of 159427978 is about 12626.4792400732. The cubic root of 159427978 is about 542.2357897116.

The spelling of 159427978 in words is "one hundred fifty-nine million, four hundred twenty-seven thousand, nine hundred seventy-eight".