68911247 has 2 divisors, whose sum is σ = 68911248. Its totient is φ = 68911246.

The previous prime is 68911231. The next prime is 68911253. The reversal of 68911247 is 74211986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68911247 - 2⁴ = 68911231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68911247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68911207) 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, 34455623 + 34455624.

It is an arithmetic number, because the mean of its divisors is an integer number (34455624).

Almost surely, 2^68911247 is an apocalyptic number.

68911247 is a deficient number, since it is larger than the sum of its proper divisors (1).

68911247 is an equidigital number, since it uses as much as digits as its factorization.

68911247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 68911247 is about 8301.2798410847. The cubic root of 68911247 is about 409.9806594089.

The spelling of 68911247 in words is "sixty-eight million, nine hundred eleven thousand, two hundred forty-seven".