55750393 has 2 divisors, whose sum is σ = 55750394. Its totient is φ = 55750392.

The previous prime is 55750301. The next prime is 55750397. The reversal of 55750393 is 39305755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55532304 + 218089 = 7452^2 + 467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55750393 is a prime.

It is not a weakly prime, because it can be changed into another prime (55750397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27875196 + 27875197.

It is an arithmetic number, because the mean of its divisors is an integer number (27875197).

Almost surely, 2^55750393 is an apocalyptic number.

It is an amenable number.

55750393 is a deficient number, since it is larger than the sum of its proper divisors (1).

55750393 is an equidigital number, since it uses as much as digits as its factorization.

55750393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70875, while the sum is 37.

The square root of 55750393 is about 7466.6185787142. The cubic root of 55750393 is about 382.0169601307.

The spelling of 55750393 in words is "fifty-five million, seven hundred fifty thousand, three hundred ninety-three".