77899963 has 2 divisors, whose sum is σ = 77899964. Its totient is φ = 77899962.

The previous prime is 77899951. The next prime is 77899999. The reversal of 77899963 is 36999877.

It is a weak prime.

It is an emirp because it is prime and its reverse (36999877) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77899963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77899898 and 77899907.

It is not a weakly prime, because it can be changed into another prime (77899903) 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, 38949981 + 38949982.

It is an arithmetic number, because the mean of its divisors is an integer number (38949982).

Almost surely, 2^77899963 is an apocalyptic number.

77899963 is a deficient number, since it is larger than the sum of its proper divisors (1).

77899963 is an equidigital number, since it uses as much as digits as its factorization.

77899963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 58.

The square root of 77899963 is about 8826.0955693897. The cubic root of 77899963 is about 427.0831302150.

The spelling of 77899963 in words is "seventy-seven million, eight hundred ninety-nine thousand, nine hundred sixty-three".