168872881 has 2 divisors, whose sum is σ = 168872882. Its totient is φ = 168872880.

The previous prime is 168872731. The next prime is 168872933. The reversal of 168872881 is 188278861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157251600 + 11621281 = 12540^2 + 3409^2 .

It is a cyclic number.

It is not a de Polignac number, because 168872881 - 2⁹ = 168872369 is a prime.

It is a super-2 number, since 2×168872881² = 57036099874480322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168872581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84436440 + 84436441.

It is an arithmetic number, because the mean of its divisors is an integer number (84436441).

Almost surely, 2^168872881 is an apocalyptic number.

It is an amenable number.

168872881 is a deficient number, since it is larger than the sum of its proper divisors (1).

168872881 is an equidigital number, since it uses as much as digits as its factorization.

168872881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 344064, while the sum is 49.

The square root of 168872881 is about 12995.1098879540. The cubic root of 168872881 is about 552.7388248366.

The spelling of 168872881 in words is "one hundred sixty-eight million, eight hundred seventy-two thousand, eight hundred eighty-one".