53855999 has 2 divisors, whose sum is σ = 53856000. Its totient is φ = 53855998.

The previous prime is 53855993. The next prime is 53856043. The reversal of 53855999 is 99955835.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53855999 - 2⁸ = 53855743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53855999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53855993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26927999 + 26928000.

It is an arithmetic number, because the mean of its divisors is an integer number (26928000).

Almost surely, 2^53855999 is an apocalyptic number.

53855999 is a deficient number, since it is larger than the sum of its proper divisors (1).

53855999 is an equidigital number, since it uses as much as digits as its factorization.

53855999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187000, while the sum is 53.

The square root of 53855999 is about 7338.6646605496. The cubic root of 53855999 is about 377.6400345933.

The spelling of 53855999 in words is "fifty-three million, eight hundred fifty-five thousand, nine hundred ninety-nine".