53807309 has 2 divisors, whose sum is σ = 53807310. Its totient is φ = 53807308.

The previous prime is 53807269. The next prime is 53807311. The reversal of 53807309 is 90370835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51696100 + 2111209 = 7190^2 + 1453^2 .

It is a cyclic number.

It is not a de Polignac number, because 53807309 - 2⁸ = 53807053 is a prime.

Together with 53807311, 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 (53807359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26903654 + 26903655.

It is an arithmetic number, because the mean of its divisors is an integer number (26903655).

Almost surely, 2^53807309 is an apocalyptic number.

It is an amenable number.

53807309 is a deficient number, since it is larger than the sum of its proper divisors (1).

53807309 is an equidigital number, since it uses as much as digits as its factorization.

53807309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 53807309 is about 7335.3465494140. The cubic root of 53807309 is about 377.5261949865.

The spelling of 53807309 in words is "fifty-three million, eight hundred seven thousand, three hundred nine".