99649768 has 8 divisors (see below), whose sum is σ = 186843330. Its totient is φ = 49824880.

The previous prime is 99649763. The next prime is 99649787. The reversal of 99649768 is 86794699.

It can be written as a sum of positive squares in only one way, i.e., 98843364 + 806404 = 9942^2 + 898^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (99649763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6228103 + ... + 6228118.

Almost surely, 2^99649768 is an apocalyptic number.

It is an amenable number.

99649768 is a deficient number, since it is larger than the sum of its proper divisors (87193562).

99649768 is a wasteful number, since it uses less digits than its factorization.

99649768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12456227 (or 12456223 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 58.

The square root of 99649768 is about 9982.4730402842. The cubic root of 99649768 is about 463.6163718711.

The spelling of 99649768 in words is "ninety-nine million, six hundred forty-nine thousand, seven hundred sixty-eight".