55929989 has 4 divisors (see below), whose sum is σ = 56015520. Its totient is φ = 55844460.

The previous prime is 55929967. The next prime is 55930001. The reversal of 55929989 is 98992955.

55929989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55929989 - 2⁸ = 55929733 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 (55929889) 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 3 ways as a sum of consecutive naturals, for example, 41777 + ... + 43094.

It is an arithmetic number, because the mean of its divisors is an integer number (14003880).

Almost surely, 2^55929989 is an apocalyptic number.

It is an amenable number.

55929989 is a deficient number, since it is larger than the sum of its proper divisors (85531).

55929989 is an equidigital number, since it uses as much as digits as its factorization.

55929989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85530.

The product of its digits is 2624400, while the sum is 56.

The square root of 55929989 is about 7478.6355038871. The cubic root of 55929989 is about 382.4267340840.

The spelling of 55929989 in words is "fifty-five million, nine hundred twenty-nine thousand, nine hundred eighty-nine".