53165909 has 2 divisors, whose sum is σ = 53165910. Its totient is φ = 53165908.

The previous prime is 53165891. The next prime is 53165911. The reversal of 53165909 is 90956135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45185284 + 7980625 = 6722^2 + 2825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53165909 is a prime.

It is a super-2 number, since 2×53165909² = 5653227759592562, which contains 22 as substring.

Together with 53165911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53165939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26582954 + 26582955.

It is an arithmetic number, because the mean of its divisors is an integer number (26582955).

Almost surely, 2^53165909 is an apocalyptic number.

It is an amenable number.

53165909 is a deficient number, since it is larger than the sum of its proper divisors (1).

53165909 is an equidigital number, since it uses as much as digits as its factorization.

53165909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 53165909 is about 7291.4956627567. The cubic root of 53165909 is about 376.0201178499.

The spelling of 53165909 in words is "fifty-three million, one hundred sixty-five thousand, nine hundred nine".