168249653 has 12 divisors (see below), whose sum is σ = 199163244. Its totient is φ = 141187200.

The previous prime is 168249649. The next prime is 168249659. The reversal of 168249653 is 356942861.

It can be written as a sum of positive squares in 2 ways, for example, as 30492484 + 137757169 = 5522^2 + 11737^2 .

It is not a de Polignac number, because 168249653 - 2² = 168249649 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 (168249659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51908 + ... + 55053.

It is an arithmetic number, because the mean of its divisors is an integer number (16596937).

Almost surely, 2^168249653 is an apocalyptic number.

168249653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

168249653 is a deficient number, since it is larger than the sum of its proper divisors (30913591).

168249653 is a wasteful number, since it uses less digits than its factorization.

168249653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106996 (or 106985 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 168249653 is about 12971.1083951989. The cubic root of 168249653 is about 552.0580228950.

The spelling of 168249653 in words is "one hundred sixty-eight million, two hundred forty-nine thousand, six hundred fifty-three".