168899249 has 4 divisors (see below), whose sum is σ = 169352436. Its totient is φ = 168446064.

The previous prime is 168899243. The next prime is 168899251. The reversal of 168899249 is 942998861.

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 32126224 + 136773025 = 5668^2 + 11695^2 .

It is a cyclic number.

It is not a de Polignac number, because 168899249 - 2⁸ = 168898993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 168899194 and 168899203.

It is not an unprimeable number, because it can be changed into a prime (168899243) 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 in 3 ways as a sum of consecutive naturals, for example, 226034 + ... + 226779.

It is an arithmetic number, because the mean of its divisors is an integer number (42338109).

Almost surely, 2^168899249 is an apocalyptic number.

It is an amenable number.

168899249 is a deficient number, since it is larger than the sum of its proper divisors (453187).

168899249 is an equidigital number, since it uses as much as digits as its factorization.

168899249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453186.

The product of its digits is 2239488, while the sum is 56.

The square root of 168899249 is about 12996.1243838307. The cubic root of 168899249 is about 552.7675917583.

The spelling of 168899249 in words is "one hundred sixty-eight million, eight hundred ninety-nine thousand, two hundred forty-nine".