168069481 has 2 divisors, whose sum is σ = 168069482. Its totient is φ = 168069480.

The previous prime is 168069449. The next prime is 168069491. The reversal of 168069481 is 184960861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121352256 + 46717225 = 11016^2 + 6835^2 .

It is a cyclic number.

It is not a de Polignac number, because 168069481 - 2⁵ = 168069449 is a prime.

It is a super-2 number, since 2×168069481² = 56494700887218722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168069491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84034740 + 84034741.

It is an arithmetic number, because the mean of its divisors is an integer number (84034741).

Almost surely, 2^168069481 is an apocalyptic number.

It is an amenable number.

168069481 is a deficient number, since it is larger than the sum of its proper divisors (1).

168069481 is an equidigital number, since it uses as much as digits as its factorization.

168069481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 168069481 is about 12964.1614075111. The cubic root of 168069481 is about 551.8608933676.

The spelling of 168069481 in words is "one hundred sixty-eight million, sixty-nine thousand, four hundred eighty-one".