99449806 has 4 divisors (see below), whose sum is σ = 149174712. Its totient is φ = 49724902.

The previous prime is 99449761. The next prime is 99449809. The reversal of 99449806 is 60894499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60894499 = 71 ⋅857669.

It is a self number, because there is not a number n which added to its sum of digits gives 99449806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99449809) 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 as a sum of consecutive naturals, namely, 24862450 + ... + 24862453.

It is an arithmetic number, because the mean of its divisors is an integer number (37293678).

Almost surely, 2^99449806 is an apocalyptic number.

99449806 is the 5331-st centered heptagonal number.

99449806 is a deficient number, since it is larger than the sum of its proper divisors (49724906).

99449806 is a wasteful number, since it uses less digits than its factorization.

99449806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49724905.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 99449806 is about 9972.4523563665. The cubic root of 99449806 is about 463.3060592725.

The spelling of 99449806 in words is "ninety-nine million, four hundred forty-nine thousand, eight hundred six".