77227643 has 2 divisors, whose sum is σ = 77227644. Its totient is φ = 77227642.

The previous prime is 77227597. The next prime is 77227663. The reversal of 77227643 is 34672277.

It is a strong prime.

It is an emirp because it is prime and its reverse (34672277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77227643 - 2¹⁴ = 77211259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77227597 and 77227606.

It is not a weakly prime, because it can be changed into another prime (77227663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38613821 + 38613822.

It is an arithmetic number, because the mean of its divisors is an integer number (38613822).

Almost surely, 2^77227643 is an apocalyptic number.

77227643 is a deficient number, since it is larger than the sum of its proper divisors (1).

77227643 is an equidigital number, since it uses as much as digits as its factorization.

77227643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 38.

The square root of 77227643 is about 8787.9259782954. The cubic root of 77227643 is about 425.8509235405.

The spelling of 77227643 in words is "seventy-seven million, two hundred twenty-seven thousand, six hundred forty-three".