80397999 has 12 divisors (see below), whose sum is σ = 126687912. Its totient is φ = 48726000.

The previous prime is 80397983. The next prime is 80398001. The reversal of 80397999 is 99979308.

It is a happy number.

It is not a de Polignac number, because 80397999 - 2⁴ = 80397983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80397959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405952 + ... + 406149.

It is an arithmetic number, because the mean of its divisors is an integer number (10557326).

Almost surely, 2^80397999 is an apocalyptic number.

80397999 is a deficient number, since it is larger than the sum of its proper divisors (46289913).

80397999 is a wasteful number, since it uses less digits than its factorization.

80397999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812118 (or 812115 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 80397999 is about 8966.4931271930. The cubic root of 80397999 is about 431.6003086844.

The spelling of 80397999 in words is "eighty million, three hundred ninety-seven thousand, nine hundred ninety-nine".