80987243 has 4 divisors (see below), whose sum is σ = 81133200. Its totient is φ = 80841288.

The previous prime is 80987219. The next prime is 80987267. The reversal of 80987243 is 34278908.

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

It is an interprime number because it is at equal distance from previous prime (80987219) and next prime (80987267).

It is a cyclic number.

It is not a de Polignac number, because 80987243 - 2¹⁰ = 80986219 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 80987243.

It is not an unprimeable number, because it can be changed into a prime (80987293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72143 + ... + 73256.

It is an arithmetic number, because the mean of its divisors is an integer number (20283300).

Almost surely, 2^80987243 is an apocalyptic number.

80987243 is a deficient number, since it is larger than the sum of its proper divisors (145957).

80987243 is a wasteful number, since it uses less digits than its factorization.

80987243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145956.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 80987243 is about 8999.2912498707. The cubic root of 80987243 is about 432.6521553592.

The spelling of 80987243 in words is "eighty million, nine hundred eighty-seven thousand, two hundred forty-three".