55891589 has 8 divisors (see below), whose sum is σ = 60428760. Its totient is φ = 51388416.

The previous prime is 55891567. The next prime is 55891639. The reversal of 55891589 is 98519855.

55891589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 18130564 + 37761025 = 4258^2 + 6145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55891589 - 2²⁰ = 54843013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55891519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5024 + ... + 11705.

It is an arithmetic number, because the mean of its divisors is an integer number (7553595).

Almost surely, 2^55891589 is an apocalyptic number.

It is an amenable number.

55891589 is a deficient number, since it is larger than the sum of its proper divisors (4537171).

55891589 is a wasteful number, since it uses less digits than its factorization.

55891589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16999.

The product of its digits is 648000, while the sum is 50.

The square root of 55891589 is about 7476.0677498268. The cubic root of 55891589 is about 382.3391928028.

The spelling of 55891589 in words is "fifty-five million, eight hundred ninety-one thousand, five hundred eighty-nine".