78369227 has 2 divisors, whose sum is σ = 78369228. Its totient is φ = 78369226.

The previous prime is 78369149. The next prime is 78369251. The reversal of 78369227 is 72296387.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78369227 - 2¹⁰ = 78368203 is a prime.

It is a super-2 number, since 2×78369227² = 12283471481155058, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78369127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39184613 + 39184614.

It is an arithmetic number, because the mean of its divisors is an integer number (39184614).

Almost surely, 2^78369227 is an apocalyptic number.

78369227 is a deficient number, since it is larger than the sum of its proper divisors (1).

78369227 is an equidigital number, since it uses as much as digits as its factorization.

78369227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 44.

The square root of 78369227 is about 8852.6395498744. The cubic root of 78369227 is about 427.9389870666.

The spelling of 78369227 in words is "seventy-eight million, three hundred sixty-nine thousand, two hundred twenty-seven".