77968823 has 2 divisors, whose sum is σ = 77968824. Its totient is φ = 77968822.

The previous prime is 77968811. The next prime is 77968831. The reversal of 77968823 is 32886977.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77968823 - 2⁸ = 77968567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77968123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38984411 + 38984412.

It is an arithmetic number, because the mean of its divisors is an integer number (38984412).

Almost surely, 2^77968823 is an apocalyptic number.

77968823 is a deficient number, since it is larger than the sum of its proper divisors (1).

77968823 is an equidigital number, since it uses as much as digits as its factorization.

77968823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 77968823 is about 8829.9956398630. The cubic root of 77968823 is about 427.2089337973.

The spelling of 77968823 in words is "seventy-seven million, nine hundred sixty-eight thousand, eight hundred twenty-three".