10003999 has 2 divisors, whose sum is σ = 10004000. Its totient is φ = 10003998.

The previous prime is 10003957. The next prime is 10004017. The reversal of 10003999 is 99930001.

10003999 is nontrivially palindromic in base 11.

10003999 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10003999 - 2¹⁷ = 9872927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10003999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10003199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001999 + 5002000.

It is an arithmetic number, because the mean of its divisors is an integer number (5002000).

Almost surely, 2^10003999 is an apocalyptic number.

10003999 is a deficient number, since it is larger than the sum of its proper divisors (1).

10003999 is an equidigital number, since it uses as much as digits as its factorization.

10003999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 10003999 is about 3162.9098943852. The cubic root of 10003999 is about 215.4721837903.

The spelling of 10003999 in words is "ten million, three thousand, nine hundred ninety-nine".