55664897 has 2 divisors, whose sum is σ = 55664898. Its totient is φ = 55664896.

The previous prime is 55664831. The next prime is 55664929. The reversal of 55664897 is 79846655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49900096 + 5764801 = 7064^2 + 2401^2 .

It is a cyclic number.

It is not a de Polignac number, because 55664897 - 2⁸ = 55664641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55664827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27832448 + 27832449.

It is an arithmetic number, because the mean of its divisors is an integer number (27832449).

Almost surely, 2^55664897 is an apocalyptic number.

It is an amenable number.

55664897 is a deficient number, since it is larger than the sum of its proper divisors (1).

55664897 is an equidigital number, since it uses as much as digits as its factorization.

55664897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 50.

The square root of 55664897 is about 7460.8911666101. The cubic root of 55664897 is about 381.8215795530.

The spelling of 55664897 in words is "fifty-five million, six hundred sixty-four thousand, eight hundred ninety-seven".