68489579 has 2 divisors, whose sum is σ = 68489580. Its totient is φ = 68489578.

The previous prime is 68489569. The next prime is 68489581. The reversal of 68489579 is 97598486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68489579 - 2²⁴ = 51712363 is a prime.

Together with 68489581, 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 (68489569) 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, 34244789 + 34244790.

It is an arithmetic number, because the mean of its divisors is an integer number (34244790).

Almost surely, 2^68489579 is an apocalyptic number.

68489579 is a deficient number, since it is larger than the sum of its proper divisors (1).

68489579 is an equidigital number, since it uses as much as digits as its factorization.

68489579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 56.

The square root of 68489579 is about 8275.8430990444. The cubic root of 68489579 is about 409.1427239255.

The spelling of 68489579 in words is "sixty-eight million, four hundred eighty-nine thousand, five hundred seventy-nine".