168748939 has 2 divisors, whose sum is σ = 168748940. Its totient is φ = 168748938.

The previous prime is 168748933. The next prime is 168748963. The reversal of 168748939 is 939847861.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168748939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168748939.

It is not a weakly prime, because it can be changed into another prime (168748933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84374469 + 84374470.

It is an arithmetic number, because the mean of its divisors is an integer number (84374470).

Almost surely, 2^168748939 is an apocalyptic number.

168748939 is a deficient number, since it is larger than the sum of its proper divisors (1).

168748939 is an equidigital number, since it uses as much as digits as its factorization.

168748939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The square root of 168748939 is about 12990.3402187933. The cubic root of 168748939 is about 552.6035666433.

The spelling of 168748939 in words is "one hundred sixty-eight million, seven hundred forty-eight thousand, nine hundred thirty-nine".