53165993 has 2 divisors, whose sum is σ = 53165994. Its totient is φ = 53165992.

The previous prime is 53165951. The next prime is 53165999. The reversal of 53165993 is 39956135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53042089 + 123904 = 7283^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 53165993 - 2⁸ = 53165737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53165993.

It is not a weakly prime, because it can be changed into another prime (53165999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26582996 + 26582997.

It is an arithmetic number, because the mean of its divisors is an integer number (26582997).

Almost surely, 2^53165993 is an apocalyptic number.

It is an amenable number.

53165993 is a deficient number, since it is larger than the sum of its proper divisors (1).

53165993 is an equidigital number, since it uses as much as digits as its factorization.

53165993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109350, while the sum is 41.

The square root of 53165993 is about 7291.5014228895. The cubic root of 53165993 is about 376.0203158821.

The spelling of 53165993 in words is "fifty-three million, one hundred sixty-five thousand, nine hundred ninety-three".