77894233 has 2 divisors, whose sum is σ = 77894234. Its totient is φ = 77894232.

The previous prime is 77894231. The next prime is 77894239. The reversal of 77894233 is 33249877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75829264 + 2064969 = 8708^2 + 1437^2 .

It is an emirp because it is prime and its reverse (33249877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77894233 - 2¹ = 77894231 is a prime.

Together with 77894231, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 77894233.

It is not a weakly prime, because it can be changed into another prime (77894231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38947116 + 38947117.

It is an arithmetic number, because the mean of its divisors is an integer number (38947117).

Almost surely, 2^77894233 is an apocalyptic number.

It is an amenable number.

77894233 is a deficient number, since it is larger than the sum of its proper divisors (1).

77894233 is an equidigital number, since it uses as much as digits as its factorization.

77894233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 43.

The square root of 77894233 is about 8825.7709578257. The cubic root of 77894233 is about 427.0726584670.

The spelling of 77894233 in words is "seventy-seven million, eight hundred ninety-four thousand, two hundred thirty-three".