77228069 has 2 divisors, whose sum is σ = 77228070. Its totient is φ = 77228068.

The previous prime is 77228033. The next prime is 77228077. The reversal of 77228069 is 96082277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57532225 + 19695844 = 7585^2 + 4438^2 .

It is a cyclic number.

It is not a de Polignac number, because 77228069 - 2²⁴ = 60450853 is a prime.

It is a super-2 number, since 2×77228069² = 11928349282937522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77228009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38614034 + 38614035.

It is an arithmetic number, because the mean of its divisors is an integer number (38614035).

Almost surely, 2^77228069 is an apocalyptic number.

It is an amenable number.

77228069 is a deficient number, since it is larger than the sum of its proper divisors (1).

77228069 is an equidigital number, since it uses as much as digits as its factorization.

77228069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 77228069 is about 8787.9502160629. The cubic root of 77228069 is about 425.8517065596.

The spelling of 77228069 in words is "seventy-seven million, two hundred twenty-eight thousand, sixty-nine".