68855623 has 2 divisors, whose sum is σ = 68855624. Its totient is φ = 68855622.

The previous prime is 68855617. The next prime is 68855659. The reversal of 68855623 is 32655886.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68855623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68855623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68855663) 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, 34427811 + 34427812.

It is an arithmetic number, because the mean of its divisors is an integer number (34427812).

Almost surely, 2^68855623 is an apocalyptic number.

68855623 is a deficient number, since it is larger than the sum of its proper divisors (1).

68855623 is an equidigital number, since it uses as much as digits as its factorization.

68855623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The square root of 68855623 is about 8297.9288379691. The cubic root of 68855623 is about 409.8703198837.

The spelling of 68855623 in words is "sixty-eight million, eight hundred fifty-five thousand, six hundred twenty-three".