168699905 has 16 divisors (see below), whose sum is σ = 223959168. Its totient is φ = 120960000.

The previous prime is 168699899. The next prime is 168699913. The reversal of 168699905 is 509996861.

It is a de Polignac number, because none of the positive numbers 2^k-168699905 is a prime.

It is a Duffinian 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, 17696 + ... + 25505.

It is an arithmetic number, because the mean of its divisors is an integer number (13997448).

Almost surely, 2^168699905 is an apocalyptic number.

It is an amenable number.

168699905 is a deficient number, since it is larger than the sum of its proper divisors (55259263).

168699905 is a wasteful number, since it uses less digits than its factorization.

168699905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43288.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The square root of 168699905 is about 12988.4527561985. The cubic root of 168699905 is about 552.5500374411.

The spelling of 168699905 in words is "one hundred sixty-eight million, six hundred ninety-nine thousand, nine hundred five".