940254221 has 2 divisors, whose sum is σ = 940254222. Its totient is φ = 940254220.

The previous prime is 940254209. The next prime is 940254229. The reversal of 940254221 is 122452049.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856732900 + 83521321 = 29270^2 + 9139^2 .

It is an emirp because it is prime and its reverse (122452049) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-940254221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (940254229) 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, 470127110 + 470127111.

It is an arithmetic number, because the mean of its divisors is an integer number (470127111).

Almost surely, 2^940254221 is an apocalyptic number.

It is an amenable number.

940254221 is a deficient number, since it is larger than the sum of its proper divisors (1).

940254221 is an equidigital number, since it uses as much as digits as its factorization.

940254221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 940254221 is about 30663.5650406146. The cubic root of 940254221 is about 979.6744097487.

The spelling of 940254221 in words is "nine hundred forty million, two hundred fifty-four thousand, two hundred twenty-one".