80677789 has 2 divisors, whose sum is σ = 80677790. Its totient is φ = 80677788.

The previous prime is 80677787. The next prime is 80677811. The reversal of 80677789 is 98777608.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47844889 + 32832900 = 6917^2 + 5730^2 .

It is a cyclic number.

It is not a de Polignac number, because 80677789 - 2¹ = 80677787 is a prime.

Together with 80677787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80677783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40338894 + 40338895.

It is an arithmetic number, because the mean of its divisors is an integer number (40338895).

Almost surely, 2^80677789 is an apocalyptic number.

It is an amenable number.

80677789 is a deficient number, since it is larger than the sum of its proper divisors (1).

80677789 is an equidigital number, since it uses as much as digits as its factorization.

80677789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 80677789 is about 8982.0815516227. The cubic root of 80677789 is about 432.1003942626.

The spelling of 80677789 in words is "eighty million, six hundred seventy-seven thousand, seven hundred eighty-nine".