80845439 has 4 divisors (see below), whose sum is σ = 81121656. Its totient is φ = 80569224.

The previous prime is 80845433. The next prime is 80845447. The reversal of 80845439 is 93454808.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80845439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80845396 and 80845405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80845433) 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, 137669 + ... + 138254.

It is an arithmetic number, because the mean of its divisors is an integer number (20280414).

Almost surely, 2^80845439 is an apocalyptic number.

80845439 is a deficient number, since it is larger than the sum of its proper divisors (276217).

80845439 is a wasteful number, since it uses less digits than its factorization.

80845439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276216.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 80845439 is about 8991.4091776540. The cubic root of 80845439 is about 432.3994914965.

The spelling of 80845439 in words is "eighty million, eight hundred forty-five thousand, four hundred thirty-nine".