80782089 has 4 divisors (see below), whose sum is σ = 107709456. Its totient is φ = 53854724.

The previous prime is 80782069. The next prime is 80782133. The reversal of 80782089 is 98028708.

It is a happy number.

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 80782089 - 2¹⁶ = 80716553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80782089.

It is not an unprimeable number, because it can be changed into a prime (80782069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13463679 + ... + 13463684.

It is an arithmetic number, because the mean of its divisors is an integer number (26927364).

Almost surely, 2^80782089 is an apocalyptic number.

It is an amenable number.

80782089 is a deficient number, since it is larger than the sum of its proper divisors (26927367).

80782089 is a wasteful number, since it uses less digits than its factorization.

80782089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26927366.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 80782089 is about 8987.8856801809. The cubic root of 80782089 is about 432.2865201027.

The spelling of 80782089 in words is "eighty million, seven hundred eighty-two thousand, eighty-nine".