165044801 has 2 divisors, whose sum is σ = 165044802. Its totient is φ = 165044800.

The previous prime is 165044779. The next prime is 165044839. The reversal of 165044801 is 108440561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155650576 + 9394225 = 12476^2 + 3065^2 .

It is a cyclic number.

It is not a de Polignac number, because 165044801 - 2¹⁴ = 165028417 is a prime.

It is equal to p_9241292 and since 165044801 and 9241292 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (165044881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82522400 + 82522401.

It is an arithmetic number, because the mean of its divisors is an integer number (82522401).

Almost surely, 2^165044801 is an apocalyptic number.

It is an amenable number.

165044801 is a deficient number, since it is larger than the sum of its proper divisors (1).

165044801 is an equidigital number, since it uses as much as digits as its factorization.

165044801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 165044801 is about 12846.9763368662. The cubic root of 165044801 is about 548.5302921285.

The spelling of 165044801 in words is "one hundred sixty-five million, forty-four thousand, eight hundred one".