55009889 has 8 divisors (see below), whose sum is σ = 61028640. Its totient is φ = 49160800.

The previous prime is 55009873. The next prime is 55009891. The reversal of 55009889 is 98890055.

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 55009889 - 2⁴ = 55009873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55009289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41732 + ... + 43029.

It is an arithmetic number, because the mean of its divisors is an integer number (7628580).

Almost surely, 2^55009889 is an apocalyptic number.

55009889 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

55009889 is a deficient number, since it is larger than the sum of its proper divisors (6018751).

55009889 is a wasteful number, since it uses less digits than its factorization.

55009889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84831.

The product of its (nonzero) digits is 129600, while the sum is 44.

The square root of 55009889 is about 7416.8651733735. The cubic root of 55009889 is about 380.3180370720.

The spelling of 55009889 in words is "fifty-five million, nine thousand, eight hundred eighty-nine".