165733923 has 4 divisors (see below), whose sum is σ = 220978568. Its totient is φ = 110489280.

The previous prime is 165733877. The next prime is 165733943. The reversal of 165733923 is 329337561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 165733923 - 2¹² = 165729827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165733943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27622318 + ... + 27622323.

It is an arithmetic number, because the mean of its divisors is an integer number (55244642).

Almost surely, 2^165733923 is an apocalyptic number.

165733923 is a deficient number, since it is larger than the sum of its proper divisors (55244645).

165733923 is an equidigital number, since it uses as much as digits as its factorization.

165733923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55244644.

The product of its digits is 102060, while the sum is 39.

The square root of 165733923 is about 12873.7687955004. The cubic root of 165733923 is about 549.2926697878.

The spelling of 165733923 in words is "one hundred sixty-five million, seven hundred thirty-three thousand, nine hundred twenty-three".