99938479 has 2 divisors, whose sum is σ = 99938480. Its totient is φ = 99938478.

The previous prime is 99938477. The next prime is 99938521. The reversal of 99938479 is 97483999.

It is a weak prime.

It is an emirp because it is prime and its reverse (97483999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99938479 - 2¹ = 99938477 is a prime.

Together with 99938477, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99938477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49969239 + 49969240.

It is an arithmetic number, because the mean of its divisors is an integer number (49969240).

Almost surely, 2^99938479 is an apocalyptic number.

99938479 is a deficient number, since it is larger than the sum of its proper divisors (1).

99938479 is an equidigital number, since it uses as much as digits as its factorization.

99938479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 58.

The square root of 99938479 is about 9996.9234767502. The cubic root of 99938479 is about 464.0636787728.

The spelling of 99938479 in words is "ninety-nine million, nine hundred thirty-eight thousand, four hundred seventy-nine".