77268379 has 2 divisors, whose sum is σ = 77268380. Its totient is φ = 77268378.

The previous prime is 77268343. The next prime is 77268397. The reversal of 77268379 is 97386277.

Together with next prime (77268397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (97386277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77268379 - 2²¹ = 75171227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77268479) 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, 38634189 + 38634190.

It is an arithmetic number, because the mean of its divisors is an integer number (38634190).

Almost surely, 2^77268379 is an apocalyptic number.

77268379 is a deficient number, since it is larger than the sum of its proper divisors (1).

77268379 is an equidigital number, since it uses as much as digits as its factorization.

77268379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 49.

The square root of 77268379 is about 8790.2433982228. The cubic root of 77268379 is about 425.9257862593.

The spelling of 77268379 in words is "seventy-seven million, two hundred sixty-eight thousand, three hundred seventy-nine".