10000001003999 has 2 divisors, whose sum is σ = 10000001004000. Its totient is φ = 10000001003998.

The previous prime is 10000001003959. The next prime is 10000001004001. The reversal of 10000001003999 is 99930010000001.

10000001003999 is digitally balanced in base 2, because in such base 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 10000001003999 - 2⁸ = 10000001003743 is a prime.

Together with 10000001004001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10000001003959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000000501999 + 5000000502000.

It is an arithmetic number, because the mean of its divisors is an integer number (5000000502000).

Almost surely, 2^{10000001003999} is an apocalyptic number.

10000001003999 is a deficient number, since it is larger than the sum of its proper divisors (1).

10000001003999 is an equidigital number, since it uses as much as digits as its factorization.

10000001003999 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 32.

The spelling of 10000001003999 in words is "ten trillion, one million, three thousand, nine hundred ninety-nine".