4987999 has 2 divisors, whose sum is σ = 4988000. Its totient is φ = 4987998.

The previous prime is 4987979. The next prime is 4988003. The reversal of 4987999 is 9997894.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4987999 - 2⁵ = 4987967 is a prime.

It is a Chen prime.

It is an Ulam number.

4987999 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4987979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2493999 + 2494000.

It is an arithmetic number, because the mean of its divisors is an integer number (2494000).

Almost surely, 2^4987999 is an apocalyptic number.

4987999 is a deficient number, since it is larger than the sum of its proper divisors (1).

4987999 is an equidigital number, since it uses as much as digits as its factorization.

4987999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 55.

The square root of 4987999 is about 2233.3828601474. The cubic root of 4987999 is about 170.8606755892.

The spelling of 4987999 in words is "four million, nine hundred eighty-seven thousand, nine hundred ninety-nine".