55500089 has 2 divisors, whose sum is σ = 55500090. Its totient is φ = 55500088.

The previous prime is 55500079. The next prime is 55500139. The reversal of 55500089 is 98000555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36096064 + 19404025 = 6008^2 + 4405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55500089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55500079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750044 + 27750045.

It is an arithmetic number, because the mean of its divisors is an integer number (27750045).

Almost surely, 2^55500089 is an apocalyptic number.

It is an amenable number.

55500089 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500089 is an equidigital number, since it uses as much as digits as its factorization.

55500089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 55500089 is about 7449.8381861622. The cubic root of 55500089 is about 381.4443851876. Note that the first 3 decimals are identical.

The spelling of 55500089 in words is "fifty-five million, five hundred thousand, eighty-nine".