68440459 has 2 divisors, whose sum is σ = 68440460. Its totient is φ = 68440458.

The previous prime is 68440423. The next prime is 68440469. The reversal of 68440459 is 95404486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68440459 - 2¹³ = 68432267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68440469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34220229 + 34220230.

It is an arithmetic number, because the mean of its divisors is an integer number (34220230).

Almost surely, 2^68440459 is an apocalyptic number.

68440459 is a deficient number, since it is larger than the sum of its proper divisors (1).

68440459 is an equidigital number, since it uses as much as digits as its factorization.

68440459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 68440459 is about 8272.8748932883. The cubic root of 68440459 is about 409.0448895918.

The spelling of 68440459 in words is "sixty-eight million, four hundred forty thousand, four hundred fifty-nine".