80399987 has 8 divisors (see below), whose sum is σ = 85226976. Its totient is φ = 75583872.

The previous prime is 80399983. The next prime is 80399999. The reversal of 80399987 is 78999308.

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

It is a cyclic number.

It is not a de Polignac number, because 80399987 - 2² = 80399983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80399983) 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, 16418 + ... + 20744.

It is an arithmetic number, because the mean of its divisors is an integer number (10653372).

Almost surely, 2^80399987 is an apocalyptic number.

80399987 is a deficient number, since it is larger than the sum of its proper divisors (4826989).

80399987 is a wasteful number, since it uses less digits than its factorization.

80399987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5437.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 80399987 is about 8966.6039836719. The cubic root of 80399987 is about 431.6038660464.

The spelling of 80399987 in words is "eighty million, three hundred ninety-nine thousand, nine hundred eighty-seven".