164640093 has 8 divisors (see below), whose sum is σ = 219588000. Its totient is φ = 109726128.

The previous prime is 164640043. The next prime is 164640097. The reversal of 164640093 is 390046461.

164640093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164640093 - 2¹⁷ = 164509021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164640097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6738 + ... + 19356.

It is an arithmetic number, because the mean of its divisors is an integer number (27448500).

Almost surely, 2^164640093 is an apocalyptic number.

It is an amenable number.

164640093 is a deficient number, since it is larger than the sum of its proper divisors (54947907).

164640093 is a wasteful number, since it uses less digits than its factorization.

164640093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16971.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 164640093 is about 12831.2155698515. The cubic root of 164640093 is about 548.0815729617.

The spelling of 164640093 in words is "one hundred sixty-four million, six hundred forty thousand, ninety-three".