68326409 has 2 divisors, whose sum is σ = 68326410. Its totient is φ = 68326408.

The previous prime is 68326403. The next prime is 68326411. The reversal of 68326409 is 90462386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43296400 + 25030009 = 6580^2 + 5003^2 .

It is a cyclic number.

It is not a de Polignac number, because 68326409 - 2⁴ = 68326393 is a prime.

Together with 68326411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68326403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34163204 + 34163205.

It is an arithmetic number, because the mean of its divisors is an integer number (34163205).

Almost surely, 2^68326409 is an apocalyptic number.

It is an amenable number.

68326409 is a deficient number, since it is larger than the sum of its proper divisors (1).

68326409 is an equidigital number, since it uses as much as digits as its factorization.

68326409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 68326409 is about 8265.9790103774. The cubic root of 68326409 is about 408.8175508318.

The spelling of 68326409 in words is "sixty-eight million, three hundred twenty-six thousand, four hundred nine".