1123013989 has 2 divisors, whose sum is σ = 1123013990. Its totient is φ = 1123013988.

The previous prime is 1123013963. The next prime is 1123014007. The reversal of 1123013989 is 9893103211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1086229764 + 36784225 = 32958^2 + 6065^2 .

It is an emirp because it is prime and its reverse (9893103211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123013989 - 2¹¹ = 1123011941 is a prime.

It is a super-2 number, since 2×1123013989² = 2522320838979384242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123013189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561506994 + 561506995.

It is an arithmetic number, because the mean of its divisors is an integer number (561506995).

Almost surely, 2^1123013989 is an apocalyptic number.

It is an amenable number.

1123013989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123013989 is an equidigital number, since it uses as much as digits as its factorization.

1123013989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 1123013989 is about 33511.4008808943. The cubic root of 1123013989 is about 1039.4295407617.

The spelling of 1123013989 in words is "one billion, one hundred twenty-three million, thirteen thousand, nine hundred eighty-nine".