80918289 has 12 divisors (see below), whose sum is σ = 117438672. Its totient is φ = 53688600.

The previous prime is 80918287. The next prime is 80918293. The reversal of 80918289 is 98281908.

It is not a de Polignac number, because 80918289 - 2¹ = 80918287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80918287) 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 11 ways as a sum of consecutive naturals, for example, 19407 + ... + 23204.

It is an arithmetic number, because the mean of its divisors is an integer number (9786556).

Almost surely, 2^80918289 is an apocalyptic number.

It is an amenable number.

80918289 is a deficient number, since it is larger than the sum of its proper divisors (36520383).

80918289 is a wasteful number, since it uses less digits than its factorization.

80918289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42828 (or 42825 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 80918289 is about 8995.4593545855. The cubic root of 80918289 is about 432.5293312105.

The spelling of 80918289 in words is "eighty million, nine hundred eighteen thousand, two hundred eighty-nine".