80788643 has 4 divisors (see below), whose sum is σ = 87003168. Its totient is φ = 74574120.

The previous prime is 80788621. The next prime is 80788651. The reversal of 80788643 is 34688708.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 80788643 - 2⁶ = 80788579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80788594 and 80788603.

It is not an unprimeable number, because it can be changed into a prime (80781643) 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, 3107243 + ... + 3107268.

It is an arithmetic number, because the mean of its divisors is an integer number (21750792).

Almost surely, 2^80788643 is an apocalyptic number.

80788643 is a deficient number, since it is larger than the sum of its proper divisors (6214525).

80788643 is a wasteful number, since it uses less digits than its factorization.

80788643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6214524.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 80788643 is about 8988.2502746641. The cubic root of 80788643 is about 432.2982105210.

The spelling of 80788643 in words is "eighty million, seven hundred eighty-eight thousand, six hundred forty-three".