55867891 has 8 divisors (see below), whose sum is σ = 59357520. Its totient is φ = 52482528.

The previous prime is 55867843. The next prime is 55867907. The reversal of 55867891 is 19876855.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55867891 - 2¹⁷ = 55736819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55867811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24961 + ... + 27106.

It is an arithmetic number, because the mean of its divisors is an integer number (7419690).

Almost surely, 2^55867891 is an apocalyptic number.

55867891 is a deficient number, since it is larger than the sum of its proper divisors (3489629).

55867891 is a wasteful number, since it uses less digits than its factorization.

55867891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52133.

The product of its digits is 604800, while the sum is 49.

The square root of 55867891 is about 7474.4826576827. The cubic root of 55867891 is about 382.2851479681.

The spelling of 55867891 in words is "fifty-five million, eight hundred sixty-seven thousand, eight hundred ninety-one".