68784473 has 2 divisors, whose sum is σ = 68784474. Its totient is φ = 68784472.

The previous prime is 68784413. The next prime is 68784479. The reversal of 68784473 is 37448786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52243984 + 16540489 = 7228^2 + 4067^2 .

It is a cyclic number.

It is not a de Polignac number, because 68784473 - 2⁸ = 68784217 is a prime.

It is not a weakly prime, because it can be changed into another prime (68784479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34392236 + 34392237.

It is an arithmetic number, because the mean of its divisors is an integer number (34392237).

Almost surely, 2^68784473 is an apocalyptic number.

It is an amenable number.

68784473 is a deficient number, since it is larger than the sum of its proper divisors (1).

68784473 is an equidigital number, since it uses as much as digits as its factorization.

68784473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 47.

The square root of 68784473 is about 8293.6405154793. The cubic root of 68784473 is about 409.7290952825.

The spelling of 68784473 in words is "sixty-eight million, seven hundred eighty-four thousand, four hundred seventy-three".