168544979 has 2 divisors, whose sum is σ = 168544980. Its totient is φ = 168544978.

The previous prime is 168544967. The next prime is 168544997. The reversal of 168544979 is 979445861.

168544979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (168544997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (979445861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168544979 is a prime.

It is a super-2 number, since 2×168544979² = 56814819892220882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168544979.

It is not a weakly prime, because it can be changed into another prime (168544949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84272489 + 84272490.

It is an arithmetic number, because the mean of its divisors is an integer number (84272490).

Almost surely, 2^168544979 is an apocalyptic number.

168544979 is a deficient number, since it is larger than the sum of its proper divisors (1).

168544979 is an equidigital number, since it uses as much as digits as its factorization.

168544979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 168544979 is about 12982.4873964892. The cubic root of 168544979 is about 552.3808403779.

It can be divided in two parts, 1685 and 44979, that added together give a palindrome (46664).

The spelling of 168544979 in words is "one hundred sixty-eight million, five hundred forty-four thousand, nine hundred seventy-nine".