159667989 has 12 divisors (see below), whose sum is σ = 230527296. Its totient is φ = 98256912.

The previous prime is 159667951. The next prime is 159667999. The reversal of 159667989 is 989766951.

It is not a de Polignac number, because 159667989 - 2⁹ = 159667477 is a prime.

It is a super-2 number, since 2×159667989² = 50987733422608242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159667919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156957 + ... + 157970.

It is an arithmetic number, because the mean of its divisors is an integer number (19210608).

Almost surely, 2^159667989 is an apocalyptic number.

It is an amenable number.

159667989 is a deficient number, since it is larger than the sum of its proper divisors (70859307).

159667989 is a wasteful number, since it uses less digits than its factorization.

159667989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314956 (or 314943 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 60.

The square root of 159667989 is about 12635.9799382557. The cubic root of 159667989 is about 542.5077564069.

The spelling of 159667989 in words is "one hundred fifty-nine million, six hundred sixty-seven thousand, nine hundred eighty-nine".