168960981 has 32 divisors (see below), whose sum is σ = 267164928. Its totient is φ = 92966400.

The previous prime is 168960947. The next prime is 168960991. The reversal of 168960981 is 189069861.

It is not a de Polignac number, because 168960981 - 2¹³ = 168952789 is a prime.

It is a super-2 number, since 2×168960981² = 57095626200964722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168960981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168960991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77401 + ... + 79553.

It is an arithmetic number, because the mean of its divisors is an integer number (8348904).

Almost surely, 2^168960981 is an apocalyptic number.

It is an amenable number.

168960981 is a deficient number, since it is larger than the sum of its proper divisors (98203947).

168960981 is a wasteful number, since it uses less digits than its factorization.

168960981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 168960981 is about 12998.4991825980. The cubic root of 168960981 is about 552.8349283365.

The spelling of 168960981 in words is "one hundred sixty-eight million, nine hundred sixty thousand, nine hundred eighty-one".