77663903 has 2 divisors, whose sum is σ = 77663904. Its totient is φ = 77663902.

The previous prime is 77663899. The next prime is 77663909. The reversal of 77663903 is 30936677.

It is a weak prime.

It is an emirp because it is prime and its reverse (30936677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77663903 - 2² = 77663899 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77663909) 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, 38831951 + 38831952.

It is an arithmetic number, because the mean of its divisors is an integer number (38831952).

Almost surely, 2^77663903 is an apocalyptic number.

77663903 is a deficient number, since it is larger than the sum of its proper divisors (1).

77663903 is an equidigital number, since it uses as much as digits as its factorization.

77663903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 41.

The square root of 77663903 is about 8812.7125789963. The cubic root of 77663903 is about 426.6512975285.

The spelling of 77663903 in words is "seventy-seven million, six hundred sixty-three thousand, nine hundred three".