165854493 has 32 divisors (see below), whose sum is σ = 286801920. Its totient is φ = 92752560.

The previous prime is 165854489. The next prime is 165854503. The reversal of 165854493 is 394458561.

165854493 is a `hidden beast` number, since 16 + 5 + 8 + 544 + 93 = 666.

It is not a de Polignac number, because 165854493 - 2² = 165854489 is a prime.

It is a super-3 number, since 3×165854493³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165854443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 453 + ... + 18218.

It is an arithmetic number, because the mean of its divisors is an integer number (8962560).

Almost surely, 2^165854493 is an apocalyptic number.

It is an amenable number.

165854493 is a deficient number, since it is larger than the sum of its proper divisors (120947427).

165854493 is a wasteful number, since it uses less digits than its factorization.

165854493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18734 (or 18728 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 165854493 is about 12878.4507220395. The cubic root of 165854493 is about 549.4258393935.

The spelling of 165854493 in words is "one hundred sixty-five million, eight hundred fifty-four thousand, four hundred ninety-three".