168406783 has 2 divisors, whose sum is σ = 168406784. Its totient is φ = 168406782.

The previous prime is 168406757. The next prime is 168406793. The reversal of 168406783 is 387604861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168406783 - 2²¹ = 166309631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168406753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84203391 + 84203392.

It is an arithmetic number, because the mean of its divisors is an integer number (84203392).

Almost surely, 2^168406783 is an apocalyptic number.

168406783 is a deficient number, since it is larger than the sum of its proper divisors (1).

168406783 is an equidigital number, since it uses as much as digits as its factorization.

168406783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 168406783 is about 12977.1639043360. The cubic root of 168406783 is about 552.2298268891.

The spelling of 168406783 in words is "one hundred sixty-eight million, four hundred six thousand, seven hundred eighty-three".