159489972 has 30 divisors (see below), whose sum is σ = 416939138. Its totient is φ = 53163216.

The previous prime is 159489961. The next prime is 159489977. The reversal of 159489972 is 279984951.

159489972 is a `hidden beast` number, since 159 + 489 + 9 + 7 + 2 = 666.

159489972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 133541136 + 25948836 = 11556^2 + 5094^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159489977) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 245803 + ... + 246450.

Almost surely, 2^159489972 is an apocalyptic number.

159489972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

159489972 is an abundant number, since it is smaller than the sum of its proper divisors (257449166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

159489972 is a wasteful number, since it uses less digits than its factorization.

159489972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492269 (or 492258 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 159489972 is about 12628.9339217529. The cubic root of 159489972 is about 542.3060638876.

It can be divided in two parts, 159489 and 972, that added together give a triangular number (160461 = T₅₆₆).

The spelling of 159489972 in words is "one hundred fifty-nine million, four hundred eighty-nine thousand, nine hundred seventy-two".