168948553 has 2 divisors, whose sum is σ = 168948554. Its totient is φ = 168948552.

The previous prime is 168948539. The next prime is 168948557. The reversal of 168948553 is 355849861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126607504 + 42341049 = 11252^2 + 6507^2 .

It is an emirp because it is prime and its reverse (355849861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168948553 - 2²¹ = 166851401 is a prime.

It is a super-2 number, since 2×168948553² = 57087227121587618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 168948497 and 168948506.

It is not a weakly prime, because it can be changed into another prime (168948557) 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, 84474276 + 84474277.

It is an arithmetic number, because the mean of its divisors is an integer number (84474277).

Almost surely, 2^168948553 is an apocalyptic number.

It is an amenable number.

168948553 is a deficient number, since it is larger than the sum of its proper divisors (1).

168948553 is an equidigital number, since it uses as much as digits as its factorization.

168948553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 49.

The square root of 168948553 is about 12998.0211186165. The cubic root of 168948553 is about 552.8213733313.

The spelling of 168948553 in words is "one hundred sixty-eight million, nine hundred forty-eight thousand, five hundred fifty-three".