80842791 has 4 divisors (see below), whose sum is σ = 107790392. Its totient is φ = 53895192.

The previous prime is 80842789. The next prime is 80842813. The reversal of 80842791 is 19724808.

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

It is not a de Polignac number, because 80842791 - 2¹ = 80842789 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 (80842711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13473796 + ... + 13473801.

It is an arithmetic number, because the mean of its divisors is an integer number (26947598).

Almost surely, 2^80842791 is an apocalyptic number.

80842791 is a deficient number, since it is larger than the sum of its proper divisors (26947601).

80842791 is a wasteful number, since it uses less digits than its factorization.

80842791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26947600.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 80842791 is about 8991.2619247801. The cubic root of 80842791 is about 432.3947705278.

The spelling of 80842791 in words is "eighty million, eight hundred forty-two thousand, seven hundred ninety-one".