68912839 has 2 divisors, whose sum is σ = 68912840. Its totient is φ = 68912838.

The previous prime is 68912821. The next prime is 68912843. The reversal of 68912839 is 93821986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68912839 - 2²¹ = 66815687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68912939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34456419 + 34456420.

It is an arithmetic number, because the mean of its divisors is an integer number (34456420).

Almost surely, 2^68912839 is an apocalyptic number.

68912839 is a deficient number, since it is larger than the sum of its proper divisors (1).

68912839 is an equidigital number, since it uses as much as digits as its factorization.

68912839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 46.

The square root of 68912839 is about 8301.3757293596. The cubic root of 68912839 is about 409.9838165335.

It can be divided in two parts, 68912 and 839, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 68912839 in words is "sixty-eight million, nine hundred twelve thousand, eight hundred thirty-nine".