4549891 has 4 divisors (see below), whose sum is σ = 4635792. Its totient is φ = 4463992.

The previous prime is 4549861. The next prime is 4549933. The reversal of 4549891 is 1989454.

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

It is a cyclic number.

It is not a de Polignac number, because 4549891 - 2⁵ = 4549859 is a prime.

It is a super-2 number, since 2×4549891² = 41403016223762, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4549801) 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, 42871 + ... + 42976.

It is an arithmetic number, because the mean of its divisors is an integer number (1158948).

Almost surely, 2^4549891 is an apocalyptic number.

4549891 is a deficient number, since it is larger than the sum of its proper divisors (85901).

4549891 is an equidigital number, since it uses as much as digits as its factorization.

4549891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85900.

The product of its digits is 51840, while the sum is 40.

The square root of 4549891 is about 2133.0473506230. The cubic root of 4549891 is about 165.7042564071.

The spelling of 4549891 in words is "four million, five hundred forty-nine thousand, eight hundred ninety-one".