168936073 has 4 divisors (see below), whose sum is σ = 170677780. Its totient is φ = 167194368.

The previous prime is 168936067. The next prime is 168936077. The reversal of 168936073 is 370639861.

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 54937744 + 113998329 = 7412^2 + 10677^2 .

It is a cyclic number.

It is not a de Polignac number, because 168936073 - 2⁵ = 168936041 is a prime.

It is a super-2 number, since 2×168936073² = 57078793521322658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168936077) 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, 870708 + ... + 870901.

It is an arithmetic number, because the mean of its divisors is an integer number (42669445).

Almost surely, 2^168936073 is an apocalyptic number.

It is an amenable number.

168936073 is a deficient number, since it is larger than the sum of its proper divisors (1741707).

168936073 is an equidigital number, since it uses as much as digits as its factorization.

168936073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741706.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 168936073 is about 12997.5410366731. The cubic root of 168936073 is about 552.8077609416.

The spelling of 168936073 in words is "one hundred sixty-eight million, nine hundred thirty-six thousand, seventy-three".