68221801 has 2 divisors, whose sum is σ = 68221802. Its totient is φ = 68221800.

The previous prime is 68221771. The next prime is 68221807. The reversal of 68221801 is 10812286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36917776 + 31304025 = 6076^2 + 5595^2 .

It is a cyclic number.

It is not a de Polignac number, because 68221801 - 2²¹ = 66124649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68221801.

It is not a weakly prime, because it can be changed into another prime (68221807) 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, 34110900 + 34110901.

It is an arithmetic number, because the mean of its divisors is an integer number (34110901).

Almost surely, 2^68221801 is an apocalyptic number.

It is an amenable number.

68221801 is a deficient number, since it is larger than the sum of its proper divisors (1).

68221801 is an equidigital number, since it uses as much as digits as its factorization.

68221801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 68221801 is about 8259.6489634851. The cubic root of 68221801 is about 408.6088105105.

The spelling of 68221801 in words is "sixty-eight million, two hundred twenty-one thousand, eight hundred one".