80851239 has 12 divisors (see below), whose sum is σ = 133468816. Its totient is φ = 46200672.

The previous prime is 80851229. The next prime is 80851247. The reversal of 80851239 is 93215808.

It is not a de Polignac number, because 80851239 - 2¹⁹ = 80326951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80851219) 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, 641614 + ... + 641739.

Almost surely, 2^80851239 is an apocalyptic number.

80851239 is a deficient number, since it is larger than the sum of its proper divisors (52617577).

80851239 is a wasteful number, since it uses less digits than its factorization.

80851239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283366 (or 1283363 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 80851239 is about 8991.7317019582. The cubic root of 80851239 is about 432.4098316266.

The spelling of 80851239 in words is "eighty million, eight hundred fifty-one thousand, two hundred thirty-nine".