55406789 has 4 divisors (see below), whose sum is σ = 56233824. Its totient is φ = 54579756.

The previous prime is 55406777. The next prime is 55406801. The reversal of 55406789 is 98760455.

55406789 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 an interprime number because it is at equal distance from previous prime (55406777) and next prime (55406801).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55406789 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 (55406719) 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, 413417 + ... + 413550.

It is an arithmetic number, because the mean of its divisors is an integer number (14058456).

Almost surely, 2^55406789 is an apocalyptic number.

It is an amenable number.

55406789 is a deficient number, since it is larger than the sum of its proper divisors (827035).

55406789 is an equidigital number, since it uses as much as digits as its factorization.

55406789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827034.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 55406789 is about 7443.5736712953. The cubic root of 55406789 is about 381.2305193307.

The spelling of 55406789 in words is "fifty-five million, four hundred six thousand, seven hundred eighty-nine".