53665637 has 2 divisors, whose sum is σ = 53665638. Its totient is φ = 53665636.

The previous prime is 53665613. The next prime is 53665649. The reversal of 53665637 is 73656635.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52287361 + 1378276 = 7231^2 + 1174^2 .

It is a cyclic number.

It is not a de Polignac number, because 53665637 - 2²² = 49471333 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 53665594 and 53665603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53665607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26832818 + 26832819.

It is an arithmetic number, because the mean of its divisors is an integer number (26832819).

Almost surely, 2^53665637 is an apocalyptic number.

It is an amenable number.

53665637 is a deficient number, since it is larger than the sum of its proper divisors (1).

53665637 is an equidigital number, since it uses as much as digits as its factorization.

53665637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 41.

The square root of 53665637 is about 7325.6833810915. The cubic root of 53665637 is about 377.1945677912.

The spelling of 53665637 in words is "fifty-three million, six hundred sixty-five thousand, six hundred thirty-seven".