99849779 has 2 divisors, whose sum is σ = 99849780. Its totient is φ = 99849778.

The previous prime is 99849767. The next prime is 99849797. The reversal of 99849779 is 97794899.

Together with next prime (99849797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99849779 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99849749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49924889 + 49924890.

It is an arithmetic number, because the mean of its divisors is an integer number (49924890).

Almost surely, 2^99849779 is an apocalyptic number.

99849779 is a deficient number, since it is larger than the sum of its proper divisors (1).

99849779 is an equidigital number, since it uses as much as digits as its factorization.

99849779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 62.

The square root of 99849779 is about 9992.4861270857. The cubic root of 99849779 is about 463.9263455101.

The spelling of 99849779 in words is "ninety-nine million, eight hundred forty-nine thousand, seven hundred seventy-nine".