159842978 has 8 divisors (see below), whose sum is σ = 239820780. Its totient is φ = 79902720.

The previous prime is 159842933. The next prime is 159842981. The reversal of 159842978 is 879248951.

It can be written as a sum of positive squares in 2 ways, for example, as 138839089 + 21003889 = 11783^2 + 4583^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6938 + ... + 19178.

Almost surely, 2^159842978 is an apocalyptic number.

159842978 is a deficient number, since it is larger than the sum of its proper divisors (79977802).

159842978 is a wasteful number, since it uses less digits than its factorization.

159842978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18772.

The product of its digits is 1451520, while the sum is 53.

The square root of 159842978 is about 12642.9022775627. The cubic root of 159842978 is about 542.7058721568.

The spelling of 159842978 in words is "one hundred fifty-nine million, eight hundred forty-two thousand, nine hundred seventy-eight".