99977863 has 2 divisors, whose sum is σ = 99977864. Its totient is φ = 99977862.

The previous prime is 99977861. The next prime is 99977873. The reversal of 99977863 is 36877999.

It is a weak prime.

It is an emirp because it is prime and its reverse (36877999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99977863 - 2¹ = 99977861 is a prime.

Together with 99977861, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 99977798 and 99977807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99977861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49988931 + 49988932.

It is an arithmetic number, because the mean of its divisors is an integer number (49988932).

Almost surely, 2^99977863 is an apocalyptic number.

99977863 is a deficient number, since it is larger than the sum of its proper divisors (1).

99977863 is an equidigital number, since it uses as much as digits as its factorization.

99977863 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 99977863 is about 9998.8930887374. The cubic root of 99977863 is about 464.1246305496.

The spelling of 99977863 in words is "ninety-nine million, nine hundred seventy-seven thousand, eight hundred sixty-three".