77964563 has 2 divisors, whose sum is σ = 77964564. Its totient is φ = 77964562.

The previous prime is 77964559. The next prime is 77964571. The reversal of 77964563 is 36546977.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77964563 - 2² = 77964559 is a prime.

It is not a weakly prime, because it can be changed into another prime (77964553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38982281 + 38982282.

It is an arithmetic number, because the mean of its divisors is an integer number (38982282).

Almost surely, 2^77964563 is an apocalyptic number.

77964563 is a deficient number, since it is larger than the sum of its proper divisors (1).

77964563 is an equidigital number, since it uses as much as digits as its factorization.

77964563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 47.

The square root of 77964563 is about 8829.7544133458. The cubic root of 77964563 is about 427.2011531522.

The spelling of 77964563 in words is "seventy-seven million, nine hundred sixty-four thousand, five hundred sixty-three".