168558149 has 2 divisors, whose sum is σ = 168558150. Its totient is φ = 168558148.

The previous prime is 168558127. The next prime is 168558163. The reversal of 168558149 is 941855861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96393124 + 72165025 = 9818^2 + 8495^2 .

It is an emirp because it is prime and its reverse (941855861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168558149 - 2¹² = 168554053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168558119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84279074 + 84279075.

It is an arithmetic number, because the mean of its divisors is an integer number (84279075).

Almost surely, 2^168558149 is an apocalyptic number.

It is an amenable number.

168558149 is a deficient number, since it is larger than the sum of its proper divisors (1).

168558149 is an equidigital number, since it uses as much as digits as its factorization.

168558149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 47.

The square root of 168558149 is about 12982.9946083329. The cubic root of 168558149 is about 552.3952275685.

The spelling of 168558149 in words is "one hundred sixty-eight million, five hundred fifty-eight thousand, one hundred forty-nine".