1047444221 has 2 divisors, whose sum is σ = 1047444222. Its totient is φ = 1047444220.

The previous prime is 1047444193. The next prime is 1047444227. The reversal of 1047444221 is 1224447401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1019205625 + 28238596 = 31925^2 + 5314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1047444221 is a prime.

It is a super-2 number, since 2×1047444221² = 2194278792212593682, which contains 22 as substring.

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 (1047444227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 523722110 + 523722111.

It is an arithmetic number, because the mean of its divisors is an integer number (523722111).

Almost surely, 2^1047444221 is an apocalyptic number.

It is an amenable number.

1047444221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1047444221 is an equidigital number, since it uses as much as digits as its factorization.

1047444221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 1047444221 is about 32364.2429387743. The cubic root of 1047444221 is about 1015.5710250776.

The spelling of 1047444221 in words is "one billion, forty-seven million, four hundred forty-four thousand, two hundred twenty-one".