168920641 has 8 divisors (see below), whose sum is σ = 173362464. Its totient is φ = 164502240.

The previous prime is 168920639. The next prime is 168920663. The reversal of 168920641 is 146029861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168920641 - 2¹ = 168920639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168920641.

It is not an unprimeable number, because it can be changed into a prime (168920611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9261 + ... + 20581.

It is an arithmetic number, because the mean of its divisors is an integer number (21670308).

Almost surely, 2^168920641 is an apocalyptic number.

It is an amenable number.

168920641 is a deficient number, since it is larger than the sum of its proper divisors (4441823).

168920641 is a wasteful number, since it uses less digits than its factorization.

168920641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11711.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 168920641 is about 12996.9473723640. The cubic root of 168920641 is about 552.7909277711.

The spelling of 168920641 in words is "one hundred sixty-eight million, nine hundred twenty thousand, six hundred forty-one".