1121663749 has 2 divisors, whose sum is σ = 1121663750. Its totient is φ = 1121663748.

The previous prime is 1121663713. The next prime is 1121663771. The reversal of 1121663749 is 9473661211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 746273124 + 375390625 = 27318^2 + 19375^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121663749 - 2⁹ = 1121663237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121663849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560831874 + 560831875.

It is an arithmetic number, because the mean of its divisors is an integer number (560831875).

Almost surely, 2^1121663749 is an apocalyptic number.

It is an amenable number.

1121663749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121663749 is an equidigital number, since it uses as much as digits as its factorization.

1121663749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 1121663749 is about 33491.2488420483. The cubic root of 1121663749 is about 1039.0127925533.

The spelling of 1121663749 in words is "one billion, one hundred twenty-one million, six hundred sixty-three thousand, seven hundred forty-nine".