77284069 has 2 divisors, whose sum is σ = 77284070. Its totient is φ = 77284068.

The previous prime is 77284063. The next prime is 77284073. The reversal of 77284069 is 96048277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65124900 + 12159169 = 8070^2 + 3487^2 .

It is a cyclic number.

It is not a de Polignac number, because 77284069 - 2⁵ = 77284037 is a prime.

It is a super-2 number, since 2×77284069² = 11945654642393522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77284063) 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, 38642034 + 38642035.

It is an arithmetic number, because the mean of its divisors is an integer number (38642035).

Almost surely, 2^77284069 is an apocalyptic number.

It is an amenable number.

77284069 is a deficient number, since it is larger than the sum of its proper divisors (1).

77284069 is an equidigital number, since it uses as much as digits as its factorization.

77284069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 77284069 is about 8791.1358196765. The cubic root of 77284069 is about 425.9546135899.

The spelling of 77284069 in words is "seventy-seven million, two hundred eighty-four thousand, sixty-nine".