68438479 has 2 divisors, whose sum is σ = 68438480. Its totient is φ = 68438478.

The previous prime is 68438467. The next prime is 68438519. The reversal of 68438479 is 97483486.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68438479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68438429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34219239 + 34219240.

It is an arithmetic number, because the mean of its divisors is an integer number (34219240).

Almost surely, 2^68438479 is an apocalyptic number.

68438479 is a deficient number, since it is larger than the sum of its proper divisors (1).

68438479 is an equidigital number, since it uses as much as digits as its factorization.

68438479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 68438479 is about 8272.7552242285. The cubic root of 68438479 is about 409.0409449626.

The spelling of 68438479 in words is "sixty-eight million, four hundred thirty-eight thousand, four hundred seventy-nine".