4991918 has 8 divisors (see below), whose sum is σ = 7497360. Its totient is φ = 2492800.

The previous prime is 4991893. The next prime is 4991923. The reversal of 4991918 is 8191994.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2318 + ... + 3918.

It is an arithmetic number, because the mean of its divisors is an integer number (937170).

Almost surely, 2^4991918 is an apocalyptic number.

4991918 is a deficient number, since it is larger than the sum of its proper divisors (2505442).

4991918 is a wasteful number, since it uses less digits than its factorization.

4991918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162.

The product of its digits is 23328, while the sum is 41.

The square root of 4991918 is about 2234.2600564840. The cubic root of 4991918 is about 170.9054114775.

The spelling of 4991918 in words is "four million, nine hundred ninety-one thousand, nine hundred eighteen".