68865571 has 2 divisors, whose sum is σ = 68865572. Its totient is φ = 68865570.

The previous prime is 68865553. The next prime is 68865617. The reversal of 68865571 is 17556886.

It is an a-pointer prime, because the next prime (68865617) can be obtained adding 68865571 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68865571 - 2²¹ = 66768419 is a prime.

It is not a weakly prime, because it can be changed into another prime (68865541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34432785 + 34432786.

It is an arithmetic number, because the mean of its divisors is an integer number (34432786).

Almost surely, 2^68865571 is an apocalyptic number.

68865571 is a deficient number, since it is larger than the sum of its proper divisors (1).

68865571 is an equidigital number, since it uses as much as digits as its factorization.

68865571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 46.

The square root of 68865571 is about 8298.5282430079. The cubic root of 68865571 is about 409.8900577711.

The spelling of 68865571 in words is "sixty-eight million, eight hundred sixty-five thousand, five hundred seventy-one".