80726791 has 8 divisors (see below), whose sum is σ = 82607040. Its totient is φ = 78859872.

The previous prime is 80726773. The next prime is 80726797. The reversal of 80726791 is 19762708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80726791 - 2¹⁹ = 80202503 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 (80726797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9481 + ... + 15853.

It is an arithmetic number, because the mean of its divisors is an integer number (10325880).

Almost surely, 2^80726791 is an apocalyptic number.

80726791 is a deficient number, since it is larger than the sum of its proper divisors (1880249).

80726791 is a wasteful number, since it uses less digits than its factorization.

80726791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6665.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 80726791 is about 8984.8089016962. The cubic root of 80726791 is about 432.1878594679.

The spelling of 80726791 in words is "eighty million, seven hundred twenty-six thousand, seven hundred ninety-one".