77748227 has 2 divisors, whose sum is σ = 77748228. Its totient is φ = 77748226.

The previous prime is 77748197. The next prime is 77748277. The reversal of 77748227 is 72284777.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77748227 - 2⁶ = 77748163 is a prime.

It is not a weakly prime, because it can be changed into another prime (77748277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38874113 + 38874114.

It is an arithmetic number, because the mean of its divisors is an integer number (38874114).

Almost surely, 2^77748227 is an apocalyptic number.

77748227 is a deficient number, since it is larger than the sum of its proper divisors (1).

77748227 is an equidigital number, since it uses as much as digits as its factorization.

77748227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 307328, while the sum is 44.

The square root of 77748227 is about 8817.4955060947. The cubic root of 77748227 is about 426.8056546569.

The spelling of 77748227 in words is "seventy-seven million, seven hundred forty-eight thousand, two hundred twenty-seven".