53239657 has 2 divisors, whose sum is σ = 53239658. Its totient is φ = 53239656.

The previous prime is 53239649. The next prime is 53239723. The reversal of 53239657 is 75693235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28079401 + 25160256 = 5299^2 + 5016^2 .

It is a cyclic number.

It is not a de Polignac number, because 53239657 - 2³ = 53239649 is a prime.

It is a super-2 number, since 2×53239657² = 5668922154955298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53239057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26619828 + 26619829.

It is an arithmetic number, because the mean of its divisors is an integer number (26619829).

Almost surely, 2^53239657 is an apocalyptic number.

It is an amenable number.

53239657 is a deficient number, since it is larger than the sum of its proper divisors (1).

53239657 is an equidigital number, since it uses as much as digits as its factorization.

53239657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 40.

The square root of 53239657 is about 7296.5510345642. The cubic root of 53239657 is about 376.1939003859.

The spelling of 53239657 in words is "fifty-three million, two hundred thirty-nine thousand, six hundred fifty-seven".