5557891 has 4 divisors (see below), whose sum is σ = 5676192. Its totient is φ = 5439592.

The previous prime is 5557889. The next prime is 5557907. The reversal of 5557891 is 1987555.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5557891 - 2¹ = 5557889 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5557991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59080 + ... + 59173.

It is an arithmetic number, because the mean of its divisors is an integer number (1419048).

Almost surely, 2^5557891 is an apocalyptic number.

5557891 is a deficient number, since it is larger than the sum of its proper divisors (118301).

5557891 is a wasteful number, since it uses less digits than its factorization.

5557891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118300.

The product of its digits is 63000, while the sum is 40.

The square root of 5557891 is about 2357.5179744808. The cubic root of 5557891 is about 177.1345758541.

The spelling of 5557891 in words is "five million, five hundred fifty-seven thousand, eight hundred ninety-one".