1121431393 has 2 divisors, whose sum is σ = 1121431394. Its totient is φ = 1121431392.

The previous prime is 1121431331. The next prime is 1121431403. The reversal of 1121431393 is 3931341211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 958026304 + 163405089 = 30952^2 + 12783^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121431393 - 2¹⁷ = 1121300321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121431313) 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, 560715696 + 560715697.

It is an arithmetic number, because the mean of its divisors is an integer number (560715697).

Almost surely, 2^1121431393 is an apocalyptic number.

It is an amenable number.

1121431393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121431393 is an equidigital number, since it uses as much as digits as its factorization.

1121431393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 1121431393 is about 33487.7797562036. The cubic root of 1121431393 is about 1038.9410427296.

The spelling of 1121431393 in words is "one billion, one hundred twenty-one million, four hundred thirty-one thousand, three hundred ninety-three".