55989423 has 12 divisors (see below), whose sum is σ = 92427088. Its totient is φ = 31993920.

The previous prime is 55989403. The next prime is 55989431. The reversal of 55989423 is 32498955.

55989423 is a `hidden beast` number, since 559 + 8 + 94 + 2 + 3 = 666.

It is not a de Polignac number, because 55989423 - 2¹⁷ = 55858351 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 (55989403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444298 + ... + 444423.

Almost surely, 2^55989423 is an apocalyptic number.

55989423 is a deficient number, since it is larger than the sum of its proper divisors (36437665).

55989423 is a wasteful number, since it uses less digits than its factorization.

55989423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888734 (or 888731 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 55989423 is about 7482.6080346361. The cubic root of 55989423 is about 382.5621480460.

The spelling of 55989423 in words is "fifty-five million, nine hundred eighty-nine thousand, four hundred twenty-three".