168940342 has 4 divisors (see below), whose sum is σ = 253410516. Its totient is φ = 84470170.

The previous prime is 168940337. The next prime is 168940349. The reversal of 168940342 is 243049861.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168940349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42235084 + ... + 42235087.

It is an arithmetic number, because the mean of its divisors is an integer number (63352629).

Almost surely, 2^168940342 is an apocalyptic number.

168940342 is a deficient number, since it is larger than the sum of its proper divisors (84470174).

168940342 is an equidigital number, since it uses as much as digits as its factorization.

168940342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84470173.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 168940342 is about 12997.7052590063. The cubic root of 168940342 is about 552.8124173705.

The spelling of 168940342 in words is "one hundred sixty-eight million, nine hundred forty thousand, three hundred forty-two".