88668221 has 2 divisors, whose sum is σ = 88668222. Its totient is φ = 88668220.

The previous prime is 88668191. The next prime is 88668227. The reversal of 88668221 is 12286688.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54316900 + 34351321 = 7370^2 + 5861^2 .

It is a cyclic number.

It is not a de Polignac number, because 88668221 - 2⁶ = 88668157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88668227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44334110 + 44334111.

It is an arithmetic number, because the mean of its divisors is an integer number (44334111).

Almost surely, 2^88668221 is an apocalyptic number.

It is an amenable number.

88668221 is a deficient number, since it is larger than the sum of its proper divisors (1).

88668221 is an equidigital number, since it uses as much as digits as its factorization.

88668221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 41.

The square root of 88668221 is about 9416.3804617273. The cubic root of 88668221 is about 445.9190214740.

The spelling of 88668221 in words is "eighty-eight million, six hundred sixty-eight thousand, two hundred twenty-one".