68810839 has 2 divisors, whose sum is σ = 68810840. Its totient is φ = 68810838.

The previous prime is 68810827. The next prime is 68810891. The reversal of 68810839 is 93801886.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68810839 - 2²⁵ = 35256407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68810795 and 68810804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68817839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34405419 + 34405420.

It is an arithmetic number, because the mean of its divisors is an integer number (34405420).

Almost surely, 2^68810839 is an apocalyptic number.

68810839 is a deficient number, since it is larger than the sum of its proper divisors (1).

68810839 is an equidigital number, since it uses as much as digits as its factorization.

68810839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 68810839 is about 8295.2298943429. The cubic root of 68810839 is about 409.7814401255.

The spelling of 68810839 in words is "sixty-eight million, eight hundred ten thousand, eight hundred thirty-nine".