4891109 has 4 divisors (see below), whose sum is σ = 4895616. Its totient is φ = 4886604.

The previous prime is 4891099. The next prime is 4891129. The reversal of 4891109 is 9011984.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4891109 - 2⁴ = 4891093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891129) 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, 482 + ... + 3164.

It is an arithmetic number, because the mean of its divisors is an integer number (1223904).

Almost surely, 2^4891109 is an apocalyptic number.

It is an amenable number.

4891109 is a deficient number, since it is larger than the sum of its proper divisors (4507).

4891109 is a wasteful number, since it uses less digits than its factorization.

4891109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 4891109 is about 2211.5851781019. The cubic root of 4891109 is about 169.7471327084.

The spelling of 4891109 in words is "four million, eight hundred ninety-one thousand, one hundred nine".