55068991 has 2 divisors, whose sum is σ = 55068992. Its totient is φ = 55068990.

The previous prime is 55068983. The next prime is 55069009. The reversal of 55068991 is 19986055.

It is a happy number.

55068991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55068991 - 2³ = 55068983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55068901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27534495 + 27534496.

It is an arithmetic number, because the mean of its divisors is an integer number (27534496).

Almost surely, 2^55068991 is an apocalyptic number.

55068991 is a deficient number, since it is larger than the sum of its proper divisors (1).

55068991 is an equidigital number, since it uses as much as digits as its factorization.

55068991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 55068991 is about 7420.8484016317. The cubic root of 55068991 is about 380.4541914493.

The spelling of 55068991 in words is "fifty-five million, sixty-eight thousand, nine hundred ninety-one".