99999634 has 16 divisors (see below), whose sum is σ = 173778048. Its totient is φ = 42269472.

The previous prime is 99999623. The next prime is 99999643. The reversal of 99999634 is 43699999.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47902 + ... + 49945.

It is an arithmetic number, because the mean of its divisors is an integer number (10861128).

Almost surely, 2^99999634 is an apocalyptic number.

99999634 is a deficient number, since it is larger than the sum of its proper divisors (73778414).

99999634 is a wasteful number, since it uses less digits than its factorization.

99999634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97929.

The product of its digits is 4251528, while the sum is 58.

The square root of 99999634 is about 9999.9816999833. The cubic root of 99999634 is about 464.1583170867.

The spelling of 99999634 in words is "ninety-nine million, nine hundred ninety-nine thousand, six hundred thirty-four".