80782091 has 16 divisors (see below), whose sum is σ = 92010240. Its totient is φ = 70308000.

The previous prime is 80782069. The next prime is 80782133. The reversal of 80782091 is 19028708.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 80782091 - 2¹⁰ = 80781067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80782021) 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 15 ways as a sum of consecutive naturals, for example, 61346 + ... + 62648.

It is an arithmetic number, because the mean of its divisors is an integer number (5750640).

Almost surely, 2^80782091 is an apocalyptic number.

80782091 is a deficient number, since it is larger than the sum of its proper divisors (11228149).

80782091 is a wasteful number, since it uses less digits than its factorization.

80782091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 80782091 is about 8987.8857914417. The cubic root of 80782091 is about 432.2865236702.

The spelling of 80782091 in words is "eighty million, seven hundred eighty-two thousand, ninety-one".