80859959 has 4 divisors (see below), whose sum is σ = 80983320. Its totient is φ = 80736600.

The previous prime is 80859949. The next prime is 80859967. The reversal of 80859959 is 95995808.

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 80859959 - 2⁸ = 80859703 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 80859959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80859929) 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, 60692 + ... + 62009.

It is an arithmetic number, because the mean of its divisors is an integer number (20245830).

Almost surely, 2^80859959 is an apocalyptic number.

80859959 is a deficient number, since it is larger than the sum of its proper divisors (123361).

80859959 is a wasteful number, since it uses less digits than its factorization.

80859959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123360.

The product of its (nonzero) digits is 1166400, while the sum is 53.

The square root of 80859959 is about 8992.2165787975. The cubic root of 80859959 is about 432.4253765469.

It can be divided in two parts, 80859 and 959, that added together give a palindrome (81818).

The spelling of 80859959 in words is "eighty million, eight hundred fifty-nine thousand, nine hundred fifty-nine".