168149 has 4 divisors (see below), whose sum is σ = 169260. Its totient is φ = 167040.

The previous prime is 168143. The next prime is 168151. The reversal of 168149 is 941861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2500 + 165649 = 50^2 + 407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 168149.

It is not an unprimeable number, because it can be changed into a prime (168143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284 + ... + 645.

It is an arithmetic number, because the mean of its divisors is an integer number (42315).

2¹⁶⁸¹⁴⁹ is an apocalyptic number.

It is an amenable number.

168149 is a deficient number, since it is larger than the sum of its proper divisors (1111).

168149 is an equidigital number, since it uses as much as digits as its factorization.

168149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110.

The product of its digits is 1728, while the sum is 29.

The square root of 168149 is about 410.0597517436. The cubic root of 168149 is about 55.1947913940.

It can be divided in two parts, 1681 and 49, that multiplied together give a square (82369 = 287²).

The spelling of 168149 in words is "one hundred sixty-eight thousand, one hundred forty-nine".