80730991 has 8 divisors (see below), whose sum is σ = 88274304. Its totient is φ = 73221720.

The previous prime is 80730971. The next prime is 80731033. The reversal of 80730991 is 19903708.

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

It is not a de Polignac number, because 80730991 - 2¹¹ = 80728943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80730991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80730901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3411 + ... + 13156.

It is an arithmetic number, because the mean of its divisors is an integer number (11034288).

Almost surely, 2^80730991 is an apocalyptic number.

80730991 is a deficient number, since it is larger than the sum of its proper divisors (7543313).

80730991 is a wasteful number, since it uses less digits than its factorization.

80730991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17021.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 80730991 is about 8985.0426264988. The cubic root of 80730991 is about 432.1953545324.

The spelling of 80730991 in words is "eighty million, seven hundred thirty thousand, nine hundred ninety-one".