80003999 has 2 divisors, whose sum is σ = 80004000. Its totient is φ = 80003998.

The previous prime is 80003993. The next prime is 80004013. The reversal of 80003999 is 99930008.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80003999 - 2⁴ = 80003983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80003993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40001999 + 40002000.

It is an arithmetic number, because the mean of its divisors is an integer number (40002000).

Almost surely, 2^80003999 is an apocalyptic number.

80003999 is a deficient number, since it is larger than the sum of its proper divisors (1).

80003999 is an equidigital number, since it uses as much as digits as its factorization.

80003999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 80003999 is about 8944.4954581016. The cubic root of 80003999 is about 430.8941175404.

It can be divided in two parts, 80003 and 999, that multiplied together give a palindrome (79922997).

The spelling of 80003999 in words is "eighty million, three thousand, nine hundred ninety-nine".