999164 has 12 divisors (see below), whose sum is σ = 1755600. Its totient is φ = 497568.

The previous prime is 999149. The next prime is 999169. The reversal of 999164 is 461999.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 999164.

It is not an unprimeable number, because it can be changed into a prime (999169) 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, 1472 + ... + 2040.

It is an arithmetic number, because the mean of its divisors is an integer number (146300).

2⁹⁹⁹¹⁶⁴ is an apocalyptic number.

It is an amenable number.

999164 is a deficient number, since it is larger than the sum of its proper divisors (756436).

999164 is a wasteful number, since it uses less digits than its factorization.

999164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 1010 counting only the distinct ones).

The product of its digits is 17496, while the sum is 38.

The square root of 999164 is about 999.5819126015. The cubic root of 999164 is about 99.9721255642.

The spelling of 999164 in words is "nine hundred ninety-nine thousand, one hundred sixty-four".