4991686 has 8 divisors (see below), whose sum is σ = 8557200. Its totient is φ = 2139288.

The previous prime is 4991681. The next prime is 4991687. The reversal of 4991686 is 6861994.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991681) 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, 178261 + ... + 178288.

It is an arithmetic number, because the mean of its divisors is an integer number (1069650).

Almost surely, 2^4991686 is an apocalyptic number.

4991686 is a deficient number, since it is larger than the sum of its proper divisors (3565514).

4991686 is a wasteful number, since it uses less digits than its factorization.

4991686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356558.

The product of its digits is 93312, while the sum is 43.

The square root of 4991686 is about 2234.2081371260. The cubic root of 4991686 is about 170.9027638198.

The spelling of 4991686 in words is "four million, nine hundred ninety-one thousand, six hundred eighty-six".