80910789 has 4 divisors (see below), whose sum is σ = 107881056. Its totient is φ = 53940524.

The previous prime is 80910761. The next prime is 80910793. The reversal of 80910789 is 98701908.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80910789 - 2¹¹ = 80908741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80910789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80910719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13485129 + ... + 13485134.

It is an arithmetic number, because the mean of its divisors is an integer number (26970264).

Almost surely, 2^80910789 is an apocalyptic number.

It is an amenable number.

80910789 is a deficient number, since it is larger than the sum of its proper divisors (26970267).

80910789 is a wasteful number, since it uses less digits than its factorization.

80910789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26970266.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 80910789 is about 8995.0424679375. The cubic root of 80910789 is about 432.5159676464.

The spelling of 80910789 in words is "eighty million, nine hundred ten thousand, seven hundred eighty-nine".