165390093 has 80 divisors (see below), whose sum is σ = 291677760. Its totient is φ = 92275200.

The previous prime is 165390091. The next prime is 165390097. The reversal of 165390093 is 390093561.

It is not a de Polignac number, because 165390093 - 2¹ = 165390091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165390091) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 923878 + ... + 924056.

It is an arithmetic number, because the mean of its divisors is an integer number (3645972).

Almost surely, 2^165390093 is an apocalyptic number.

It is an amenable number.

165390093 is a deficient number, since it is larger than the sum of its proper divisors (126287667).

165390093 is a wasteful number, since it uses less digits than its factorization.

165390093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The square root of 165390093 is about 12860.4079639800. The cubic root of 165390093 is about 548.9125543783.

The spelling of 165390093 in words is "one hundred sixty-five million, three hundred ninety thousand, ninety-three".