165404093 has 2 divisors, whose sum is σ = 165404094. Its totient is φ = 165404092.

The previous prime is 165404077. The next prime is 165404147. The reversal of 165404093 is 390404561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139169209 + 26234884 = 11797^2 + 5122^2 .

It is a cyclic number.

It is not a de Polignac number, because 165404093 - 2⁴ = 165404077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165404593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82702046 + 82702047.

It is an arithmetic number, because the mean of its divisors is an integer number (82702047).

Almost surely, 2^165404093 is an apocalyptic number.

It is an amenable number.

165404093 is a deficient number, since it is larger than the sum of its proper divisors (1).

165404093 is an equidigital number, since it uses as much as digits as its factorization.

165404093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 165404093 is about 12860.9522586782. The cubic root of 165404093 is about 548.9280421236.

The spelling of 165404093 in words is "one hundred sixty-five million, four hundred four thousand, ninety-three".