78077227 has 2 divisors, whose sum is σ = 78077228. Its totient is φ = 78077226.

The previous prime is 78077191. The next prime is 78077257. The reversal of 78077227 is 72277087.

It is a strong prime.

It is an emirp because it is prime and its reverse (72277087) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78077227 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78077227.

It is not a weakly prime, because it can be changed into another prime (78077257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39038613 + 39038614.

It is an arithmetic number, because the mean of its divisors is an integer number (39038614).

Almost surely, 2^78077227 is an apocalyptic number.

78077227 is a deficient number, since it is larger than the sum of its proper divisors (1).

78077227 is an equidigital number, since it uses as much as digits as its factorization.

78077227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76832, while the sum is 40.

The square root of 78077227 is about 8836.1319025918. The cubic root of 78077227 is about 427.4068321756.

The spelling of 78077227 in words is "seventy-eight million, seventy-seven thousand, two hundred twenty-seven".