4820191 has 4 divisors (see below), whose sum is σ = 4911192. Its totient is φ = 4729192.

The previous prime is 4820183. The next prime is 4820201. The reversal of 4820191 is 1910284.

It is a happy number.

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 4820191 - 2³ = 4820183 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4820131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45421 + ... + 45526.

It is an arithmetic number, because the mean of its divisors is an integer number (1227798).

Almost surely, 2^4820191 is an apocalyptic number.

4820191 is a deficient number, since it is larger than the sum of its proper divisors (91001).

4820191 is an equidigital number, since it uses as much as digits as its factorization.

4820191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91000.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 4820191 is about 2195.4933386371. The cubic root of 4820191 is about 168.9227264809.

The spelling of 4820191 in words is "four million, eight hundred twenty thousand, one hundred ninety-one".