78522077 has 2 divisors, whose sum is σ = 78522078. Its totient is φ = 78522076.

The previous prime is 78522071. The next prime is 78522083. The reversal of 78522077 is 77022587.

It is a balanced prime because it is at equal distance from previous prime (78522071) and next prime (78522083).

It can be written as a sum of positive squares in only one way, i.e., 53860921 + 24661156 = 7339^2 + 4966^2 .

It is an emirp because it is prime and its reverse (77022587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78522077 - 2⁴ = 78522061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78522077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78522071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39261038 + 39261039.

It is an arithmetic number, because the mean of its divisors is an integer number (39261039).

Almost surely, 2^78522077 is an apocalyptic number.

It is an amenable number.

78522077 is a deficient number, since it is larger than the sum of its proper divisors (1).

78522077 is an equidigital number, since it uses as much as digits as its factorization.

78522077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 78522077 is about 8861.2683629377. The cubic root of 78522077 is about 428.2170213476.

The spelling of 78522077 in words is "seventy-eight million, five hundred twenty-two thousand, seventy-seven".