4991399 has 8 divisors (see below), whose sum is σ = 5718048. Its totient is φ = 4268160.

The previous prime is 4991383. The next prime is 4991401. The reversal of 4991399 is 9931994.

4991399 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4991399 - 2⁴ = 4991383 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991339) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 4859 + ... + 5795.

It is an arithmetic number, because the mean of its divisors is an integer number (714756).

Almost surely, 2^4991399 is an apocalyptic number.

4991399 is a deficient number, since it is larger than the sum of its proper divisors (726649).

4991399 is an equidigital number, since it uses as much as digits as its factorization.

4991399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705.

The product of its digits is 78732, while the sum is 44.

The square root of 4991399 is about 2234.1439076299. The cubic root of 4991399 is about 170.8994883712.

The spelling of 4991399 in words is "four million, nine hundred ninety-one thousand, three hundred ninety-nine".