99977848679 has 2 divisors, whose sum is σ = 99977848680. Its totient is φ = 99977848678.

The previous prime is 99977848673. The next prime is 99977848681. The reversal of 99977848679 is 97684877999.

It is a strong prime.

It is an emirp because it is prime and its reverse (97684877999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99977848679 - 2⁸ = 99977848423 is a prime.

Together with 99977848681, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99977848597 and 99977848606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99977848673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49988924339 + 49988924340.

It is an arithmetic number, because the mean of its divisors is an integer number (49988924340).

Almost surely, 2^99977848679 is an apocalyptic number.

99977848679 is a deficient number, since it is larger than the sum of its proper divisors (1).

99977848679 is an equidigital number, since it uses as much as digits as its factorization.

99977848679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456649728, while the sum is 83.

The spelling of 99977848679 in words is "ninety-nine billion, nine hundred seventy-seven million, eight hundred forty-eight thousand, six hundred seventy-nine".