164623869 has 12 divisors (see below), whose sum is σ = 251777916. Its totient is φ = 103293312.

The previous prime is 164623861. The next prime is 164623931. The reversal of 164623869 is 968326461.

164623869 is a `hidden beast` number, since 16 + 4 + 623 + 8 + 6 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 74183769 + 90440100 = 8613^2 + 9510^2 .

It is not a de Polignac number, because 164623869 - 2³ = 164623861 is a prime.

It is a super-2 number, since 2×164623869² = 54202036489058322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164623861) 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, 537834 + ... + 538139.

It is an arithmetic number, because the mean of its divisors is an integer number (20981493).

Almost surely, 2^164623869 is an apocalyptic number.

It is an amenable number.

164623869 is a deficient number, since it is larger than the sum of its proper divisors (87154047).

164623869 is a wasteful number, since it uses less digits than its factorization.

164623869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075996 (or 1075993 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 164623869 is about 12830.5833460525. The cubic root of 164623869 is about 548.0635693123.

The spelling of 164623869 in words is "one hundred sixty-four million, six hundred twenty-three thousand, eight hundred sixty-nine".