165124013 has 2 divisors, whose sum is σ = 165124014. Its totient is φ = 165124012.

The previous prime is 165123989. The next prime is 165124027. The reversal of 165124013 is 310421561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144312169 + 20811844 = 12013^2 + 4562^2 .

It is a cyclic number.

It is not a de Polignac number, because 165124013 - 2⁸ = 165123757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165124013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165124093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82562006 + 82562007.

It is an arithmetic number, because the mean of its divisors is an integer number (82562007).

Almost surely, 2^165124013 is an apocalyptic number.

It is an amenable number.

165124013 is a deficient number, since it is larger than the sum of its proper divisors (1).

165124013 is an equidigital number, since it uses as much as digits as its factorization.

165124013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 165124013 is about 12850.0588714605. The cubic root of 165124013 is about 548.6180324105.

Adding to 165124013 its reverse (310421561), we get a palindrome (475545574).

The spelling of 165124013 in words is "one hundred sixty-five million, one hundred twenty-four thousand, thirteen".