55136089 has 2 divisors, whose sum is σ = 55136090. Its totient is φ = 55136088.

The previous prime is 55136087. The next prime is 55136093. The reversal of 55136089 is 98063155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53406864 + 1729225 = 7308^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 55136089 - 2¹ = 55136087 is a prime.

Together with 55136087, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55136087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27568044 + 27568045.

It is an arithmetic number, because the mean of its divisors is an integer number (27568045).

Almost surely, 2^55136089 is an apocalyptic number.

It is an amenable number.

55136089 is a deficient number, since it is larger than the sum of its proper divisors (1).

55136089 is an equidigital number, since it uses as much as digits as its factorization.

55136089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 55136089 is about 7425.3679370116. The cubic root of 55136089 is about 380.6086483341.

The spelling of 55136089 in words is "fifty-five million, one hundred thirty-six thousand, eighty-nine".