55727999 has 2 divisors, whose sum is σ = 55728000. Its totient is φ = 55727998.

The previous prime is 55727993. The next prime is 55728017. The reversal of 55727999 is 99972755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55727999 - 2⁴ = 55727983 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55727999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55727993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27863999 + 27864000.

It is an arithmetic number, because the mean of its divisors is an integer number (27864000).

Almost surely, 2^55727999 is an apocalyptic number.

55727999 is a deficient number, since it is larger than the sum of its proper divisors (1).

55727999 is an equidigital number, since it uses as much as digits as its factorization.

55727999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1786050, while the sum is 53.

The square root of 55727999 is about 7465.1188202198. The cubic root of 55727999 is about 381.9658033403.

The spelling of 55727999 in words is "fifty-five million, seven hundred twenty-seven thousand, nine hundred ninety-nine".