55683891 has 12 divisors (see below), whose sum is σ = 85163832. Its totient is φ = 34938816.

The previous prime is 55683883. The next prime is 55683899. The reversal of 55683891 is 19838655.

55683891 is a `hidden beast` number, since 5 + 568 + 3 + 89 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (55683883) and next prime (55683899).

It is not a de Polignac number, because 55683891 - 2³ = 55683883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55683899) 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, 181821 + ... + 182126.

It is an arithmetic number, because the mean of its divisors is an integer number (7096986).

Almost surely, 2^55683891 is an apocalyptic number.

55683891 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

55683891 is a deficient number, since it is larger than the sum of its proper divisors (29479941).

55683891 is a wasteful number, since it uses less digits than its factorization.

55683891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363970 (or 363967 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 55683891 is about 7462.1639622833. The cubic root of 55683891 is about 381.8650030554.

The spelling of 55683891 in words is "fifty-five million, six hundred eighty-three thousand, eight hundred ninety-one".