55889709 has 16 divisors (see below), whose sum is σ = 76184064. Its totient is φ = 36436400.

The previous prime is 55889689. The next prime is 55889731. The reversal of 55889709 is 90798855.

It is a cyclic number.

It is not a de Polignac number, because 55889709 - 2⁵ = 55889677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55809709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26902 + ... + 28904.

It is an arithmetic number, because the mean of its divisors is an integer number (4761504).

Almost surely, 2^55889709 is an apocalyptic number.

It is an amenable number.

55889709 is a deficient number, since it is larger than the sum of its proper divisors (20294355).

55889709 is a wasteful number, since it uses less digits than its factorization.

55889709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208.

The product of its (nonzero) digits is 907200, while the sum is 51.

The square root of 55889709 is about 7475.9420142214. The cubic root of 55889709 is about 382.3349058981.

The spelling of 55889709 in words is "fifty-five million, eight hundred eighty-nine thousand, seven hundred nine".