168268939 has 2 divisors, whose sum is σ = 168268940. Its totient is φ = 168268938.

The previous prime is 168268931. The next prime is 168268967. The reversal of 168268939 is 939862861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168268939 - 2³ = 168268931 is a prime.

It is not a weakly prime, because it can be changed into another prime (168268931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84134469 + 84134470.

It is an arithmetic number, because the mean of its divisors is an integer number (84134470).

Almost surely, 2^168268939 is an apocalyptic number.

168268939 is a deficient number, since it is larger than the sum of its proper divisors (1).

168268939 is an equidigital number, since it uses as much as digits as its factorization.

168268939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 52.

The square root of 168268939 is about 12971.8517953298. The cubic root of 168268939 is about 552.0791157255.

The spelling of 168268939 in words is "one hundred sixty-eight million, two hundred sixty-eight thousand, nine hundred thirty-nine".