164608989 has 16 divisors (see below), whose sum is σ = 231329280. Its totient is φ = 103829040.

The previous prime is 164608987. The next prime is 164609009. The reversal of 164608989 is 989806461.

It is a happy number.

It is not a de Polignac number, because 164608989 - 2¹ = 164608987 is a prime.

It is a super-2 number, since 2×164608989² = 54192238519204242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164608987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60864 + ... + 63510.

It is an arithmetic number, because the mean of its divisors is an integer number (14458080).

Almost surely, 2^164608989 is an apocalyptic number.

164608989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

164608989 is a deficient number, since it is larger than the sum of its proper divisors (66720291).

164608989 is a wasteful number, since it uses less digits than its factorization.

164608989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3760.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 164608989 is about 12830.0034684329. The cubic root of 164608989 is about 548.0470560495.

The spelling of 164608989 in words is "one hundred sixty-four million, six hundred eight thousand, nine hundred eighty-nine".