1121445389 has 2 divisors, whose sum is σ = 1121445390. Its totient is φ = 1121445388.

The previous prime is 1121445383. The next prime is 1121445401. The reversal of 1121445389 is 9835441211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1068636100 + 52809289 = 32690^2 + 7267^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121445389 - 2⁴ = 1121445373 is a prime.

It is a super-2 number, since 2×1121445389² = 2515279521018722642, 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 (1121445383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560722694 + 560722695.

It is an arithmetic number, because the mean of its divisors is an integer number (560722695).

Almost surely, 2^1121445389 is an apocalyptic number.

It is an amenable number.

1121445389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121445389 is an equidigital number, since it uses as much as digits as its factorization.

1121445389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 1121445389 is about 33487.9887273034. The cubic root of 1121445389 is about 1038.9453648720.

The spelling of 1121445389 in words is "one billion, one hundred twenty-one million, four hundred forty-five thousand, three hundred eighty-nine".