165490493 has 12 divisors (see below), whose sum is σ = 198721152. Its totient is φ = 137271960.

The previous prime is 165490483. The next prime is 165490511. The reversal of 165490493 is 394094561.

It is not a de Polignac number, because 165490493 - 2¹² = 165486397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165490493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165490483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52955 + ... + 55992.

It is an arithmetic number, because the mean of its divisors is an integer number (16560096).

Almost surely, 2^165490493 is an apocalyptic number.

It is an amenable number.

165490493 is a deficient number, since it is larger than the sum of its proper divisors (33230659).

165490493 is a wasteful number, since it uses less digits than its factorization.

165490493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108992 (or 108985 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 165490493 is about 12864.3108249140. The cubic root of 165490493 is about 549.0236043038.

The spelling of 165490493 in words is "one hundred sixty-five million, four hundred ninety thousand, four hundred ninety-three".