1173438221 has 2 divisors, whose sum is σ = 1173438222. Its totient is φ = 1173438220.

The previous prime is 1173438199. The next prime is 1173438247. The reversal of 1173438221 is 1228343711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 960132196 + 213306025 = 30986^2 + 14605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1173438221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1173468221) 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, 586719110 + 586719111.

It is an arithmetic number, because the mean of its divisors is an integer number (586719111).

Almost surely, 2^1173438221 is an apocalyptic number.

It is an amenable number.

1173438221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1173438221 is an equidigital number, since it uses as much as digits as its factorization.

1173438221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 1173438221 is about 34255.4845389757. The cubic root of 1173438221 is about 1054.7594132559.

The spelling of 1173438221 in words is "one billion, one hundred seventy-three million, four hundred thirty-eight thousand, two hundred twenty-one".