4991198 has 4 divisors (see below), whose sum is σ = 7486800. Its totient is φ = 2495598.

The previous prime is 4991171. The next prime is 4991201. The reversal of 4991198 is 8911994.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

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, 1247798 + ... + 1247801.

It is an arithmetic number, because the mean of its divisors is an integer number (1871700).

Almost surely, 2^4991198 is an apocalyptic number.

4991198 is a deficient number, since it is larger than the sum of its proper divisors (2495602).

4991198 is a wasteful number, since it uses less digits than its factorization.

4991198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495601.

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

The square root of 4991198 is about 2234.0989235036. The cubic root of 4991198 is about 170.8971943411.

The spelling of 4991198 in words is "four million, nine hundred ninety-one thousand, one hundred ninety-eight".