55999877 has 2 divisors, whose sum is σ = 55999878. Its totient is φ = 55999876.

The previous prime is 55999849. The next prime is 55999883. The reversal of 55999877 is 77899955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51394561 + 4605316 = 7169^2 + 2146^2 .

It is a cyclic number.

It is not a de Polignac number, because 55999877 - 2⁶ = 55999813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55999807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27999938 + 27999939.

It is an arithmetic number, because the mean of its divisors is an integer number (27999939).

Almost surely, 2^55999877 is an apocalyptic number.

It is an amenable number.

55999877 is a deficient number, since it is larger than the sum of its proper divisors (1).

55999877 is an equidigital number, since it uses as much as digits as its factorization.

55999877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7144200, while the sum is 59.

The square root of 55999877 is about 7483.3065552602. The cubic root of 55999877 is about 382.5859564465.

The spelling of 55999877 in words is "fifty-five million, nine hundred ninety-nine thousand, eight hundred seventy-seven".