800403999 has 8 divisors (see below), whose sum is σ = 1067851440. Its totient is φ = 533279616.

The previous prime is 800403941. The next prime is 800404001. The reversal of 800403999 is 999304008.

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

It is not a de Polignac number, because 800403999 - 2⁸ = 800403743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 800403999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800403199) 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, 74922 + ... + 84935.

It is an arithmetic number, because the mean of its divisors is an integer number (133481430).

Almost surely, 2^800403999 is an apocalyptic number.

800403999 is a deficient number, since it is larger than the sum of its proper divisors (267447441).

800403999 is a wasteful number, since it uses less digits than its factorization.

800403999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161529.

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

The square root of 800403999 is about 28291.4121068567. The cubic root of 800403999 is about 928.4740068624.

The spelling of 800403999 in words is "eight hundred million, four hundred three thousand, nine hundred ninety-nine".