162316989 has 6 divisors (see below), whose sum is σ = 234457886. Its totient is φ = 108211320.

The previous prime is 162316949. The next prime is 162316993. The reversal of 162316989 is 989613261.

It is a happy number.

162316989 is a `hidden beast` number, since 1 + 623 + 16 + 9 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 112148100 + 50168889 = 10590^2 + 7083^2 .

It is not a de Polignac number, because 162316989 - 2¹² = 162312893 is a prime.

It is a super-2 number, since 2×162316989² = 52693609836052242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162316919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9017602 + ... + 9017619.

Almost surely, 2^162316989 is an apocalyptic number.

It is an amenable number.

162316989 is a deficient number, since it is larger than the sum of its proper divisors (72140897).

162316989 is a wasteful number, since it uses less digits than its factorization.

162316989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18035227 (or 18035224 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 162316989 is about 12740.3684797576. The cubic root of 162316989 is about 545.4915062151.

It can be divided in two parts, 16231 and 6989, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 162316989 in words is "one hundred sixty-two million, three hundred sixteen thousand, nine hundred eighty-nine".