168844037 has 4 divisors (see below), whose sum is σ = 169471980. Its totient is φ = 168216096.

The previous prime is 168844033. The next prime is 168844057. The reversal of 168844037 is 730448861.

It is a Cunningham number, because it is equal to 12994²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 730448861 = 14717 ⋅49633.

It can be written as a sum of positive squares in 2 ways, for example, as 11115556 + 157728481 = 3334^2 + 12559^2 .

It is a cyclic number.

It is not a de Polignac number, because 168844037 - 2² = 168844033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168843985 and 168844003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168844033) 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, 313568 + ... + 314105.

It is an arithmetic number, because the mean of its divisors is an integer number (42367995).

Almost surely, 2^168844037 is an apocalyptic number.

It is an amenable number.

168844037 is a deficient number, since it is larger than the sum of its proper divisors (627943).

168844037 is an equidigital number, since it uses as much as digits as its factorization.

168844037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627942.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 168844037 is about 12994.0000384793. Note that the first 4 decimals coincide. The cubic root of 168844037 is about 552.7073532224.

The spelling of 168844037 in words is "one hundred sixty-eight million, eight hundred forty-four thousand, thirty-seven".