80918 has 4 divisors (see below), whose sum is σ = 121380. Its totient is φ = 40458.

The previous prime is 80917. The next prime is 80923. The reversal of 80918 is 81908.

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

It is an Ulam number.

It is a zygodrome in base 3.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 80918.

It is not an unprimeable number, because it can be changed into a prime (80911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20228 + ... + 20231.

It is an arithmetic number, because the mean of its divisors is an integer number (30345).

2⁸⁰⁹¹⁸ is an apocalyptic number.

80918 is a deficient number, since it is larger than the sum of its proper divisors (40462).

80918 is a wasteful number, since it uses less digits than its factorization.

80918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40461.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 80918 is about 284.4608936216. The cubic root of 80918 is about 43.2528816283.

Subtracting 80918 from its reverse (81908), we obtain a triangular number (990 = T₄₄).

The spelling of 80918 in words is "eighty thousand, nine hundred eighteen".