99960638 has 12 divisors (see below), whose sum is σ = 153514728. Its totient is φ = 48816180.

The previous prime is 99960631. The next prime is 99960649. The reversal of 99960638 is 83606999.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99960631) 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 in 5 ways as a sum of consecutive naturals, for example, 9818 + ... + 17213.

It is an arithmetic number, because the mean of its divisors is an integer number (12792894).

Almost surely, 2^99960638 is an apocalyptic number.

99960638 is a deficient number, since it is larger than the sum of its proper divisors (53554090).

99960638 is a wasteful number, since it uses less digits than its factorization.

99960638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27119 (or 27076 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 99960638 is about 9998.0317062910. The cubic root of 99960638 is about 464.0979746291.

The spelling of 99960638 in words is "ninety-nine million, nine hundred sixty thousand, six hundred thirty-eight".