940722221 has 2 divisors, whose sum is σ = 940722222. Its totient is φ = 940722220.

The previous prime is 940722203. The next prime is 940722229. The reversal of 940722221 is 122227049.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 936666025 + 4056196 = 30605^2 + 2014^2 .

It is a cyclic number.

It is not a de Polignac number, because 940722221 - 2¹⁴ = 940705837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (940722229) 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, 470361110 + 470361111.

It is an arithmetic number, because the mean of its divisors is an integer number (470361111).

Almost surely, 2^940722221 is an apocalyptic number.

It is an amenable number.

940722221 is a deficient number, since it is larger than the sum of its proper divisors (1).

940722221 is an equidigital number, since it uses as much as digits as its factorization.

940722221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 940722221 is about 30671.1952978687. The cubic root of 940722221 is about 979.8369230938.

The spelling of 940722221 in words is "nine hundred forty million, seven hundred twenty-two thousand, two hundred twenty-one".