167898161 has 2 divisors, whose sum is σ = 167898162. Its totient is φ = 167898160.

The previous prime is 167898149. The next prime is 167898257. The reversal of 167898161 is 161898761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110986225 + 56911936 = 10535^2 + 7544^2 .

It is an emirp because it is prime and its reverse (161898761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 167898161 - 2¹⁰ = 167897137 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (167898131) 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 as a sum of consecutive naturals, namely, 83949080 + 83949081.

It is an arithmetic number, because the mean of its divisors is an integer number (83949081).

Almost surely, 2^167898161 is an apocalyptic number.

It is an amenable number.

167898161 is a deficient number, since it is larger than the sum of its proper divisors (1).

167898161 is an equidigital number, since it uses as much as digits as its factorization.

167898161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 47.

The square root of 167898161 is about 12957.5522765683. The cubic root of 167898161 is about 551.6733182640.

The spelling of 167898161 in words is "one hundred sixty-seven million, eight hundred ninety-eight thousand, one hundred sixty-one".