80564789 has 2 divisors, whose sum is σ = 80564790. Its totient is φ = 80564788.

The previous prime is 80564767. The next prime is 80564801. The reversal of 80564789 is 98746508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74684164 + 5880625 = 8642^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 80564789 - 2¹⁶ = 80499253 is a prime.

It is a super-2 number, since 2×80564789² = 12981370453229042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80564089) 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 as a sum of consecutive naturals, namely, 40282394 + 40282395.

It is an arithmetic number, because the mean of its divisors is an integer number (40282395).

Almost surely, 2^80564789 is an apocalyptic number.

It is an amenable number.

80564789 is a deficient number, since it is larger than the sum of its proper divisors (1).

80564789 is an equidigital number, since it uses as much as digits as its factorization.

80564789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 80564789 is about 8975.7890460951. The cubic root of 80564789 is about 431.8985619313.

The spelling of 80564789 in words is "eighty million, five hundred sixty-four thousand, seven hundred eighty-nine".