168258149 has 4 divisors (see below), whose sum is σ = 170148780. Its totient is φ = 166367520.

The previous prime is 168258131. The next prime is 168258161. The reversal of 168258149 is 941852861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30360100 + 137898049 = 5510^2 + 11743^2 .

It is a cyclic number.

It is not a de Polignac number, because 168258149 - 2⁸ = 168257893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168258119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945182 + ... + 945359.

It is an arithmetic number, because the mean of its divisors is an integer number (42537195).

Almost surely, 2^168258149 is an apocalyptic number.

It is an amenable number.

168258149 is a deficient number, since it is larger than the sum of its proper divisors (1890631).

168258149 is an equidigital number, since it uses as much as digits as its factorization.

168258149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890630.

The product of its digits is 138240, while the sum is 44.

The square root of 168258149 is about 12971.4358881351. The cubic root of 168258149 is about 552.0673150509.

The spelling of 168258149 in words is "one hundred sixty-eight million, two hundred fifty-eight thousand, one hundred forty-nine".