4991606 has 4 divisors (see below), whose sum is σ = 7487412. Its totient is φ = 2495802.

The previous prime is 4991587. The next prime is 4991617. The reversal of 4991606 is 6061994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6061994 = 2 ⋅3030997.

It is a super-2 number, since 2×4991606² = 49832260918472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1247900 + ... + 1247903.

It is an arithmetic number, because the mean of its divisors is an integer number (1871853).

Almost surely, 2^4991606 is an apocalyptic number.

4991606 is a deficient number, since it is larger than the sum of its proper divisors (2495806).

4991606 is a wasteful number, since it uses less digits than its factorization.

4991606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495805.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 4991606 is about 2234.1902336193. The cubic root of 4991606 is about 170.9018508154.

The spelling of 4991606 in words is "four million, nine hundred ninety-one thousand, six hundred six".