78674227 has 2 divisors, whose sum is σ = 78674228. Its totient is φ = 78674226.

The previous prime is 78674221. The next prime is 78674243. The reversal of 78674227 is 72247687.

It is a weak prime.

It is an emirp because it is prime and its reverse (72247687) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78674227 is a prime.

It is not a weakly prime, because it can be changed into another prime (78674221) 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, 39337113 + 39337114.

It is an arithmetic number, because the mean of its divisors is an integer number (39337114).

Almost surely, 2^78674227 is an apocalyptic number.

78674227 is a deficient number, since it is larger than the sum of its proper divisors (1).

78674227 is an equidigital number, since it uses as much as digits as its factorization.

78674227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424, while the sum is 43.

The square root of 78674227 is about 8869.8493222828. The cubic root of 78674227 is about 428.4934242213.

It can be divided in two parts, 786742 and 27, that added together give a square (786769 = 887²).

The spelling of 78674227 in words is "seventy-eight million, six hundred seventy-four thousand, two hundred twenty-seven".