159017972 has 24 divisors (see below), whose sum is σ = 291981312. Its totient is φ = 75679200.

The previous prime is 159017939. The next prime is 159017977. The reversal of 159017972 is 279710951.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159017977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2948 + ... + 18075.

It is an arithmetic number, because the mean of its divisors is an integer number (12165888).

Almost surely, 2^159017972 is an apocalyptic number.

It is an amenable number.

159017972 is a deficient number, since it is larger than the sum of its proper divisors (132963340).

159017972 is a wasteful number, since it uses less digits than its factorization.

159017972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21119 (or 21117 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 159017972 is about 12610.2328289370. The cubic root of 159017972 is about 541.7705623298.

The spelling of 159017972 in words is "one hundred fifty-nine million, seventeen thousand, nine hundred seventy-two".