4003399 has 4 divisors (see below), whose sum is σ = 4024336. Its totient is φ = 3982464.

The previous prime is 4003397. The next prime is 4003423. The reversal of 4003399 is 9933004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4003399 - 2¹ = 4003397 is a prime.

It is a Duffinian number.

4003399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4003397) 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, 10179 + ... + 10564.

It is an arithmetic number, because the mean of its divisors is an integer number (1006084).

Almost surely, 2^4003399 is an apocalyptic number.

4003399 is a deficient number, since it is larger than the sum of its proper divisors (20937).

4003399 is a wasteful number, since it uses less digits than its factorization.

4003399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20936.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 4003399 is about 2000.8495695579. The cubic root of 4003399 is about 158.7850556018.

The spelling of 4003399 in words is "four million, three thousand, three hundred ninety-nine".