168434261 has 2 divisors, whose sum is σ = 168434262. Its totient is φ = 168434260.

The previous prime is 168434243. The next prime is 168434269. The reversal of 168434261 is 162434861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137007025 + 31427236 = 11705^2 + 5606^2 .

It is an emirp because it is prime and its reverse (162434861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168434261 is a prime.

It is a super-2 number, since 2×168434261² = 56740200557232242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168434269) 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, 84217130 + 84217131.

It is an arithmetic number, because the mean of its divisors is an integer number (84217131).

Almost surely, 2^168434261 is an apocalyptic number.

It is an amenable number.

168434261 is a deficient number, since it is larger than the sum of its proper divisors (1).

168434261 is an equidigital number, since it uses as much as digits as its factorization.

168434261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 35.

The square root of 168434261 is about 12978.2225670544. Note that the first 3 decimals coincide. The cubic root of 168434261 is about 552.2598600143.

The spelling of 168434261 in words is "one hundred sixty-eight million, four hundred thirty-four thousand, two hundred sixty-one".