54089439889 has 2 divisors, whose sum is σ = 54089439890. Its totient is φ = 54089439888.

The previous prime is 54089439823. The next prime is 54089439923. The reversal of 54089439889 is 98893498045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49006890625 + 5082549264 = 221375^2 + 71292^2 .

It is a cyclic number.

It is not a de Polignac number, because 54089439889 - 2¹⁵ = 54089407121 is a prime.

It is not a weakly prime, because it can be changed into another prime (54089439289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27044719944 + 27044719945.

It is an arithmetic number, because the mean of its divisors is an integer number (27044719945).

Almost surely, 2^54089439889 is an apocalyptic number.

It is an amenable number.

54089439889 is a deficient number, since it is larger than the sum of its proper divisors (1).

54089439889 is an equidigital number, since it uses as much as digits as its factorization.

54089439889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 89579520, while the sum is 67.

The spelling of 54089439889 in words is "fifty-four billion, eighty-nine million, four hundred thirty-nine thousand, eight hundred eighty-nine".