4991017 has 4 divisors (see below), whose sum is σ = 4995540. Its totient is φ = 4986496.

The previous prime is 4991011. The next prime is 4991029. The reversal of 4991017 is 7101994.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3463321 + 1527696 = 1861^2 + 1236^2 .

It is a cyclic number.

It is not a de Polignac number, because 4991017 - 2³ = 4991009 is a prime.

It is a Smith number, since the sum of its digits (31) 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.

4991017 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4991017.

It is not an unprimeable number, because it can be changed into a prime (4991011) 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, 609 + ... + 3217.

It is an arithmetic number, because the mean of its divisors is an integer number (1248885).

Almost surely, 2^4991017 is an apocalyptic number.

It is an amenable number.

4991017 is a deficient number, since it is larger than the sum of its proper divisors (4523).

4991017 is a wasteful number, since it uses less digits than its factorization.

4991017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 4991017 is about 2234.0584146347. The cubic root of 4991017 is about 170.8951285201.

The spelling of 4991017 in words is "four million, nine hundred ninety-one thousand, seventeen".