168513949 has 2 divisors, whose sum is σ = 168513950. Its totient is φ = 168513948.

The previous prime is 168513931. The next prime is 168513967. The reversal of 168513949 is 949315861.

It is a balanced prime because it is at equal distance from previous prime (168513931) and next prime (168513967).

It can be written as a sum of positive squares in only one way, i.e., 105945849 + 62568100 = 10293^2 + 7910^2 .

It is a cyclic number.

It is not a de Polignac number, because 168513949 - 2²¹ = 166416797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168513899 and 168513908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168513749) 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, 84256974 + 84256975.

It is an arithmetic number, because the mean of its divisors is an integer number (84256975).

Almost surely, 2^168513949 is an apocalyptic number.

It is an amenable number.

168513949 is a deficient number, since it is larger than the sum of its proper divisors (1).

168513949 is an equidigital number, since it uses as much as digits as its factorization.

168513949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 46.

The square root of 168513949 is about 12981.2922700323. The cubic root of 168513949 is about 552.3469395767.

The spelling of 168513949 in words is "one hundred sixty-eight million, five hundred thirteen thousand, nine hundred forty-nine".