53809697 has 2 divisors, whose sum is σ = 53809698. Its totient is φ = 53809696.

The previous prime is 53809663. The next prime is 53809699. The reversal of 53809697 is 79690835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39551521 + 14258176 = 6289^2 + 3776^2 .

It is a cyclic number.

It is not a de Polignac number, because 53809697 - 2⁶ = 53809633 is a prime.

Together with 53809699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53809699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26904848 + 26904849.

It is an arithmetic number, because the mean of its divisors is an integer number (26904849).

Almost surely, 2^53809697 is an apocalyptic number.

It is an amenable number.

53809697 is a deficient number, since it is larger than the sum of its proper divisors (1).

53809697 is an equidigital number, since it uses as much as digits as its factorization.

53809697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 53809697 is about 7335.5093211038. The cubic root of 53809697 is about 377.5317798487.

The spelling of 53809697 in words is "fifty-three million, eight hundred nine thousand, six hundred ninety-seven".