4917891 has 8 divisors (see below), whose sum is σ = 7153344. Its totient is φ = 2980520.

The previous prime is 4917863. The next prime is 4917901. The reversal of 4917891 is 1987194.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4917891 - 2⁵ = 4917859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4917391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74481 + ... + 74546.

It is an arithmetic number, because the mean of its divisors is an integer number (894168).

Almost surely, 2^4917891 is an apocalyptic number.

4917891 is a deficient number, since it is larger than the sum of its proper divisors (2235453).

4917891 is a wasteful number, since it uses less digits than its factorization.

4917891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149041.

The product of its digits is 18144, while the sum is 39.

The square root of 4917891 is about 2217.6318450094. The cubic root of 4917891 is about 170.0563942084.

The spelling of 4917891 in words is "four million, nine hundred seventeen thousand, eight hundred ninety-one".