55397933 has 2 divisors, whose sum is σ = 55397934. Its totient is φ = 55397932.

The previous prime is 55397857. The next prime is 55397957. The reversal of 55397933 is 33979355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50438404 + 4959529 = 7102^2 + 2227^2 .

It is a cyclic number.

It is not a de Polignac number, because 55397933 - 2²⁴ = 38620717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55397983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27698966 + 27698967.

It is an arithmetic number, because the mean of its divisors is an integer number (27698967).

Almost surely, 2^55397933 is an apocalyptic number.

It is an amenable number.

55397933 is a deficient number, since it is larger than the sum of its proper divisors (1).

55397933 is an equidigital number, since it uses as much as digits as its factorization.

55397933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 382725, while the sum is 44.

The square root of 55397933 is about 7442.9787719703. The cubic root of 55397933 is about 381.2102067936.

The spelling of 55397933 in words is "fifty-five million, three hundred ninety-seven thousand, nine hundred thirty-three".