165393001 has 2 divisors, whose sum is σ = 165393002. Its totient is φ = 165393000.

The previous prime is 165392993. The next prime is 165393077. The reversal of 165393001 is 100393561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146894400 + 18498601 = 12120^2 + 4301^2 .

It is an emirp because it is prime and its reverse (100393561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165393001 - 2³ = 165392993 is a prime.

It is not a weakly prime, because it can be changed into another prime (165393101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82696500 + 82696501.

It is an arithmetic number, because the mean of its divisors is an integer number (82696501).

Almost surely, 2^165393001 is an apocalyptic number.

It is an amenable number.

165393001 is a deficient number, since it is larger than the sum of its proper divisors (1).

165393001 is an equidigital number, since it uses as much as digits as its factorization.

165393001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 165393001 is about 12860.5210236600. The cubic root of 165393001 is about 548.9157714761.

The spelling of 165393001 in words is "one hundred sixty-five million, three hundred ninety-three thousand, one".