80540839 has 4 divisors (see below), whose sum is σ = 80570920. Its totient is φ = 80510760.

The previous prime is 80540819. The next prime is 80540879. The reversal of 80540839 is 93804508.

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 80540839 - 2⁵ = 80540807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80540798 and 80540807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80540819) 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, 10584 + ... + 16525.

It is an arithmetic number, because the mean of its divisors is an integer number (20142730).

Almost surely, 2^80540839 is an apocalyptic number.

80540839 is a deficient number, since it is larger than the sum of its proper divisors (30081).

80540839 is a wasteful number, since it uses less digits than its factorization.

80540839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30080.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 80540839 is about 8974.4548023821. The cubic root of 80540839 is about 431.8557599585.

The spelling of 80540839 in words is "eighty million, five hundred forty thousand, eight hundred thirty-nine".