164671689 has 64 divisors (see below), whose sum is σ = 290304000. Its totient is φ = 80600832.

The previous prime is 164671687. The next prime is 164671769. The reversal of 164671689 is 986176461.

It is a happy number.

It is not a de Polignac number, because 164671689 - 2¹ = 164671687 is a prime.

It is a super-2 number, since 2×164671689² = 54233530316225442, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164671687) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 274612 + ... + 275210.

It is an arithmetic number, because the mean of its divisors is an integer number (4536000).

Almost surely, 2^164671689 is an apocalyptic number.

164671689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

164671689 is a deficient number, since it is larger than the sum of its proper divisors (125632311).

164671689 is a wasteful number, since it uses less digits than its factorization.

164671689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694.

The product of its digits is 435456, while the sum is 48.

The square root of 164671689 is about 12832.4467269496. The cubic root of 164671689 is about 548.1166314083.

The spelling of 164671689 in words is "one hundred sixty-four million, six hundred seventy-one thousand, six hundred eighty-nine".