4997999 has 4 divisors (see below), whose sum is σ = 5072664. Its totient is φ = 4923336.

The previous prime is 4997989. The next prime is 4998001. The reversal of 4997999 is 9997994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9997994 = 2 ⋅4998997.

It is a cyclic number.

It is not a de Polignac number, because 4997999 - 2¹⁶ = 4932463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4997929) 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, 37232 + ... + 37365.

It is an arithmetic number, because the mean of its divisors is an integer number (1268166).

Almost surely, 2^4997999 is an apocalyptic number.

4997999 is a deficient number, since it is larger than the sum of its proper divisors (74665).

4997999 is an equidigital number, since it uses as much as digits as its factorization.

4997999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74664.

The product of its digits is 1653372, while the sum is 56.

The square root of 4997999 is about 2235.6204955224. The cubic root of 4997999 is about 170.9747805449.

The spelling of 4997999 in words is "four million, nine hundred ninety-seven thousand, nine hundred ninety-nine".