1394100221 has 2 divisors, whose sum is σ = 1394100222. Its totient is φ = 1394100220.

The previous prime is 1394100157. The next prime is 1394100233. The reversal of 1394100221 is 1220014931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 774787225 + 619312996 = 27835^2 + 24886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394100221 - 2⁶ = 1394100157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1394109221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697050110 + 697050111.

It is an arithmetic number, because the mean of its divisors is an integer number (697050111).

Almost surely, 2^1394100221 is an apocalyptic number.

It is an amenable number.

1394100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394100221 is an equidigital number, since it uses as much as digits as its factorization.

1394100221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1394100221 is about 37337.6515196122. The cubic root of 1394100221 is about 1117.1152967480.

The spelling of 1394100221 in words is "one billion, three hundred ninety-four million, one hundred thousand, two hundred twenty-one".