77327789 has 16 divisors (see below), whose sum is σ = 96647040. Its totient is φ = 60106560.

The previous prime is 77327779. The next prime is 77327797. The reversal of 77327789 is 98772377.

77327789 = 5076² + 5077² + 5078².

It is a cyclic number.

It is not a de Polignac number, because 77327789 - 2⁸ = 77327533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77327729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38207 + ... + 40179.

It is an arithmetic number, because the mean of its divisors is an integer number (6040440).

Almost surely, 2^77327789 is an apocalyptic number.

It is an amenable number.

77327789 is a deficient number, since it is larger than the sum of its proper divisors (19319251).

77327789 is a wasteful number, since it uses less digits than its factorization.

77327789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500.

The product of its digits is 1037232, while the sum is 50.

The square root of 77327789 is about 8793.6220637460. The cubic root of 77327789 is about 426.0349200290.

The spelling of 77327789 in words is "seventy-seven million, three hundred twenty-seven thousand, seven hundred eighty-nine".