80738999 has 16 divisors (see below), whose sum is σ = 94037760. Its totient is φ = 68544000.

The previous prime is 80738971. The next prime is 80739011. The reversal of 80738999 is 99983708.

It is a cyclic number.

It is not a de Polignac number, because 80738999 - 2⁸ = 80738743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80738999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80735999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12119 + ... + 17559.

It is an arithmetic number, because the mean of its divisors is an integer number (5877360).

Almost surely, 2^80738999 is an apocalyptic number.

80738999 is a deficient number, since it is larger than the sum of its proper divisors (13298761).

80738999 is a wasteful number, since it uses less digits than its factorization.

80738999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5542.

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

The square root of 80738999 is about 8985.4882449425. The cubic root of 80738999 is about 432.2096444019.

The spelling of 80738999 in words is "eighty million, seven hundred thirty-eight thousand, nine hundred ninety-nine".