4891217 has 2 divisors, whose sum is σ = 4891218. Its totient is φ = 4891216.

The previous prime is 4891213. The next prime is 4891241. The reversal of 4891217 is 7121984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4289041 + 602176 = 2071^2 + 776^2 .

It is a cyclic number.

It is not a de Polignac number, because 4891217 - 2² = 4891213 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4891213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2445608 + 2445609.

It is an arithmetic number, because the mean of its divisors is an integer number (2445609).

Almost surely, 2^4891217 is an apocalyptic number.

It is an amenable number.

4891217 is a deficient number, since it is larger than the sum of its proper divisors (1).

4891217 is an equidigital number, since it uses as much as digits as its factorization.

4891217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 4891217 is about 2211.6095948426. The cubic root of 4891217 is about 169.7483820880.

The spelling of 4891217 in words is "four million, eight hundred ninety-one thousand, two hundred seventeen".