408003999 has 8 divisors (see below), whose sum is σ = 585851952. Its totient is φ = 251079360.

The previous prime is 408003979. The next prime is 408004001. The reversal of 408003999 is 999300804.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 408003999 - 2¹³ = 407995807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 408003999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408003979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5230782 + ... + 5230859.

It is an arithmetic number, because the mean of its divisors is an integer number (73231494).

Almost surely, 2^408003999 is an apocalyptic number.

408003999 is a deficient number, since it is larger than the sum of its proper divisors (177847953).

408003999 is a wasteful number, since it uses less digits than its factorization.

408003999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10461657.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 408003999 is about 20199.1088664822. The cubic root of 408003999 is about 741.6883770497.

The spelling of 408003999 in words is "four hundred eight million, three thousand, nine hundred ninety-nine".