68434609 has 2 divisors, whose sum is σ = 68434610. Its totient is φ = 68434608.

The previous prime is 68434549. The next prime is 68434621. The reversal of 68434609 is 90643486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40640625 + 27793984 = 6375^2 + 5272^2 .

It is a cyclic number.

It is not a de Polignac number, because 68434609 - 2⁷ = 68434481 is a prime.

It is not a weakly prime, because it can be changed into another prime (68434649) 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, 34217304 + 34217305.

It is an arithmetic number, because the mean of its divisors is an integer number (34217305).

Almost surely, 2^68434609 is an apocalyptic number.

It is an amenable number.

68434609 is a deficient number, since it is larger than the sum of its proper divisors (1).

68434609 is an equidigital number, since it uses as much as digits as its factorization.

68434609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 68434609 is about 8272.5213206132. The cubic root of 68434609 is about 409.0332347859.

The spelling of 68434609 in words is "sixty-eight million, four hundred thirty-four thousand, six hundred nine".