99999013949 has 2 divisors, whose sum is σ = 99999013950. Its totient is φ = 99999013948.

The previous prime is 99999013831. The next prime is 99999013973. The reversal of 99999013949 is 94931099999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96414597049 + 3584416900 = 310507^2 + 59870^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999013949 - 2¹² = 99999009853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99999013349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999506974 + 49999506975.

It is an arithmetic number, because the mean of its divisors is an integer number (49999506975).

Almost surely, 2^99999013949 is an apocalyptic number.

It is an amenable number.

99999013949 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999013949 is an equidigital number, since it uses as much as digits as its factorization.

99999013949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57395628, while the sum is 71.

The spelling of 99999013949 in words is "ninety-nine billion, nine hundred ninety-nine million, thirteen thousand, nine hundred forty-nine".