53666897 has 2 divisors, whose sum is σ = 53666898. Its totient is φ = 53666896.

The previous prime is 53666891. The next prime is 53666923. The reversal of 53666897 is 79866635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53640976 + 25921 = 7324^2 + 161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53666897 is a prime.

It is not a weakly prime, because it can be changed into another prime (53666891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26833448 + 26833449.

It is an arithmetic number, because the mean of its divisors is an integer number (26833449).

Almost surely, 2^53666897 is an apocalyptic number.

It is an amenable number.

53666897 is a deficient number, since it is larger than the sum of its proper divisors (1).

53666897 is an equidigital number, since it uses as much as digits as its factorization.

53666897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 53666897 is about 7325.7693793894. The cubic root of 53666897 is about 377.1975197822.

The spelling of 53666897 in words is "fifty-three million, six hundred sixty-six thousand, eight hundred ninety-seven".