99938449 has 4 divisors (see below), whose sum is σ = 107626036. Its totient is φ = 92250864.

The previous prime is 99938441. The next prime is 99938477. The reversal of 99938449 is 94483999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94483999 = 139 ⋅679741.

It can be written as a sum of positive squares in 2 ways, for example, as 12852225 + 87086224 = 3585^2 + 9332^2 .

It is a cyclic number.

It is not a de Polignac number, because 99938449 - 2³ = 99938441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99938449.

It is not an unprimeable number, because it can be changed into a prime (99938441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3843774 + ... + 3843799.

It is an arithmetic number, because the mean of its divisors is an integer number (26906509).

Almost surely, 2^99938449 is an apocalyptic number.

It is an amenable number.

99938449 is a deficient number, since it is larger than the sum of its proper divisors (7687587).

99938449 is a wasteful number, since it uses less digits than its factorization.

99938449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7687586.

The product of its digits is 2519424, while the sum is 55.

The square root of 99938449 is about 9996.9219762885. The cubic root of 99938449 is about 464.0636323379.

The spelling of 99938449 in words is "ninety-nine million, nine hundred thirty-eight thousand, four hundred forty-nine".