999999164 has 12 divisors (see below), whose sum is σ = 1751445024. Its totient is φ = 499586304.

The previous prime is 999999163. The next prime is 999999181. The reversal of 999999164 is 461999999.

It is a self number, because there is not a number n which added to its sum of digits gives 999999164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97844 + ... + 107579.

It is an arithmetic number, because the mean of its divisors is an integer number (145953752).

Almost surely, 2^999999164 is an apocalyptic number.

It is an amenable number.

999999164 is a deficient number, since it is larger than the sum of its proper divisors (751445860).

999999164 is a wasteful number, since it uses less digits than its factorization.

999999164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206644 (or 206642 counting only the distinct ones).

The product of its digits is 12754584, while the sum is 65.

The square root of 999999164 is about 31622.7633833604. The cubic root of 999999164 is about 999.9997213333. Note that the first 3 decimals are identical.

The spelling of 999999164 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred sixty-four".