10387999 has 4 divisors (see below), whose sum is σ = 10440400. Its totient is φ = 10335600.

The previous prime is 10387997. The next prime is 10388023. The reversal of 10387999 is 99978301.

10387999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99978301 = 2593 ⋅38557.

It is a cyclic number.

It is not a de Polignac number, because 10387999 - 2¹ = 10387997 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 (10387997) 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, 25902 + ... + 26299.

It is an arithmetic number, because the mean of its divisors is an integer number (2610100).

Almost surely, 2^10387999 is an apocalyptic number.

10387999 is a deficient number, since it is larger than the sum of its proper divisors (52401).

10387999 is an equidigital number, since it uses as much as digits as its factorization.

10387999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52400.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 10387999 is about 3223.0418861690. The cubic root of 10387999 is about 218.1945840016.

The spelling of 10387999 in words is "ten million, three hundred eighty-seven thousand, nine hundred ninety-nine".