168873541 has 4 divisors (see below), whose sum is σ = 170162784. Its totient is φ = 167584300.

The previous prime is 168873533. The next prime is 168873557. The reversal of 168873541 is 145378861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 168873541 - 2³ = 168873533 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 (168873511) 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, 644425 + ... + 644686.

It is an arithmetic number, because the mean of its divisors is an integer number (42540696).

Almost surely, 2^168873541 is an apocalyptic number.

It is an amenable number.

168873541 is a deficient number, since it is larger than the sum of its proper divisors (1289243).

168873541 is a wasteful number, since it uses less digits than its factorization.

168873541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289242.

The product of its digits is 161280, while the sum is 43.

The square root of 168873541 is about 12995.1352820969. The cubic root of 168873541 is about 552.7395449189.

The spelling of 168873541 in words is "one hundred sixty-eight million, eight hundred seventy-three thousand, five hundred forty-one".