99999449 has 4 divisors (see below), whose sum is σ = 109090320. Its totient is φ = 90908580.

The previous prime is 99999439. The next prime is 99999481. The reversal of 99999449 is 94499999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94499999 = 11 ⋅8590909.

It is a cyclic number.

It is not a de Polignac number, because 99999449 - 2²⁴ = 83222233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99999391 and 99999400.

It is not an unprimeable number, because it can be changed into a prime (99999439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4545419 + ... + 4545440.

It is an arithmetic number, because the mean of its divisors is an integer number (27272580).

Almost surely, 2^99999449 is an apocalyptic number.

It is an amenable number.

99999449 is a deficient number, since it is larger than the sum of its proper divisors (9090871).

99999449 is a wasteful number, since it uses less digits than its factorization.

99999449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9090870.

The product of its digits is 8503056, while the sum is 62.

The square root of 99999449 is about 9999.9724499620. The cubic root of 99999449 is about 464.1580308546.

The spelling of 99999449 in words is "ninety-nine million, nine hundred ninety-nine thousand, four hundred forty-nine".