168653121 has 16 divisors (see below), whose sum is σ = 276764544. Its totient is φ = 88959744.

The previous prime is 168653117. The next prime is 168653153. The reversal of 168653121 is 121356861.

It is not a de Polignac number, because 168653121 - 2² = 168653117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168653161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308616 + ... + 309161.

It is an arithmetic number, because the mean of its divisors is an integer number (17297784).

Almost surely, 2^168653121 is an apocalyptic number.

It is an amenable number.

168653121 is a deficient number, since it is larger than the sum of its proper divisors (108111423).

168653121 is a wasteful number, since it uses less digits than its factorization.

168653121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617800.

The product of its digits is 8640, while the sum is 33.

The square root of 168653121 is about 12986.6516469797. The cubic root of 168653121 is about 552.4989548379.

The spelling of 168653121 in words is "one hundred sixty-eight million, six hundred fifty-three thousand, one hundred twenty-one".