80243867 has 4 divisors (see below), whose sum is σ = 87538776. Its totient is φ = 72948960.

The previous prime is 80243843. The next prime is 80243869. The reversal of 80243867 is 76834208.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80243867 - 2¹⁸ = 79981723 is a prime.

It is a super-2 number, since 2×80243867² = 12878156382227378, which contains 22 as substring.

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 80243867.

It is not an unprimeable number, because it can be changed into a prime (80243869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3647438 + ... + 3647459.

It is an arithmetic number, because the mean of its divisors is an integer number (21884694).

Almost surely, 2^80243867 is an apocalyptic number.

80243867 is a deficient number, since it is larger than the sum of its proper divisors (7294909).

80243867 is a wasteful number, since it uses less digits than its factorization.

80243867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7294908.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 80243867 is about 8957.8941163646. The cubic root of 80243867 is about 431.3243234779.

The spelling of 80243867 in words is "eighty million, two hundred forty-three thousand, eight hundred sixty-seven".