99906645 has 16 divisors (see below), whose sum is σ = 165007872. Its totient is φ = 51564480.

The previous prime is 99906629. The next prime is 99906659. The reversal of 99906645 is 54660999.

It is a happy number.

It is not a de Polignac number, because 99906645 - 2⁴ = 99906629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99906594 and 99906603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106962 + ... + 107891.

It is an arithmetic number, because the mean of its divisors is an integer number (10312992).

Almost surely, 2^99906645 is an apocalyptic number.

It is an amenable number.

99906645 is a deficient number, since it is larger than the sum of its proper divisors (65101227).

99906645 is a wasteful number, since it uses less digits than its factorization.

99906645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214892.

The product of its (nonzero) digits is 524880, while the sum is 48.

The square root of 99906645 is about 9995.3311600967. The cubic root of 99906645 is about 464.0143998826.

The spelling of 99906645 in words is "ninety-nine million, nine hundred six thousand, six hundred forty-five".