164993089 has 4 divisors (see below), whose sum is σ = 165822400. Its totient is φ = 164163780.

The previous prime is 164993083. The next prime is 164993141. The reversal of 164993089 is 980399461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164993089 - 2⁵ = 164993057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164993083) 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, 414357 + ... + 414754.

It is an arithmetic number, because the mean of its divisors is an integer number (41455600).

Almost surely, 2^164993089 is an apocalyptic number.

It is an amenable number.

164993089 is a deficient number, since it is larger than the sum of its proper divisors (829311).

164993089 is an equidigital number, since it uses as much as digits as its factorization.

164993089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829310.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 164993089 is about 12844.9635655381. The cubic root of 164993089 is about 548.4729974600.

The spelling of 164993089 in words is "one hundred sixty-four million, nine hundred ninety-three thousand, eighty-nine".