68622817 has 2 divisors, whose sum is σ = 68622818. Its totient is φ = 68622816.

The previous prime is 68622811. The next prime is 68622821. The reversal of 68622817 is 71822686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43612816 + 25010001 = 6604^2 + 5001^2 .

It is a cyclic number.

It is not a de Polignac number, because 68622817 - 2¹⁹ = 68098529 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68622817.

It is not a weakly prime, because it can be changed into another prime (68622811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34311408 + 34311409.

It is an arithmetic number, because the mean of its divisors is an integer number (34311409).

Almost surely, 2^68622817 is an apocalyptic number.

It is an amenable number.

68622817 is a deficient number, since it is larger than the sum of its proper divisors (1).

68622817 is an equidigital number, since it uses as much as digits as its factorization.

68622817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 68622817 is about 8283.8890021535. The cubic root of 68622817 is about 409.4078642458.

The spelling of 68622817 in words is "sixty-eight million, six hundred twenty-two thousand, eight hundred seventeen".