55678889 has 4 divisors (see below), whose sum is σ = 63633024. Its totient is φ = 47724756.

The previous prime is 55678871. The next prime is 55678907. The reversal of 55678889 is 98887655.

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 (55678871) and next prime (55678907).

It is a cyclic number.

It is not a de Polignac number, because 55678889 - 2¹² = 55674793 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55678849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3977057 + ... + 3977070.

It is an arithmetic number, because the mean of its divisors is an integer number (15908256).

Almost surely, 2^55678889 is an apocalyptic number.

It is an amenable number.

55678889 is a deficient number, since it is larger than the sum of its proper divisors (7954135).

55678889 is an equidigital number, since it uses as much as digits as its factorization.

55678889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7954134.

The product of its digits is 4838400, while the sum is 56.

The square root of 55678889 is about 7461.8287972856. The cubic root of 55678889 is about 381.8535685938.

The spelling of 55678889 in words is "fifty-five million, six hundred seventy-eight thousand, eight hundred eighty-nine".