77894863 has 2 divisors, whose sum is σ = 77894864. Its totient is φ = 77894862.

The previous prime is 77894857. The next prime is 77894897. The reversal of 77894863 is 36849877.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77894863 - 2²⁵ = 44340431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77894863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77804863) 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, 38947431 + 38947432.

It is an arithmetic number, because the mean of its divisors is an integer number (38947432).

Almost surely, 2^77894863 is an apocalyptic number.

77894863 is a deficient number, since it is larger than the sum of its proper divisors (1).

77894863 is an equidigital number, since it uses as much as digits as its factorization.

77894863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The square root of 77894863 is about 8825.8066486866. The cubic root of 77894863 is about 427.0738098362.

The spelling of 77894863 in words is "seventy-seven million, eight hundred ninety-four thousand, eight hundred sixty-three".