1123400039989 has 2 divisors, whose sum is σ = 1123400039990. Its totient is φ = 1123400039988.

The previous prime is 1123400039969. The next prime is 1123400040011. The reversal of 1123400039989 is 9899300043211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 834126023025 + 289274016964 = 913305^2 + 537842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123400039989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123400039969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561700019994 + 561700019995.

It is an arithmetic number, because the mean of its divisors is an integer number (561700019995).

Almost surely, 2^{1123400039989} is an apocalyptic number.

It is an amenable number.

1123400039989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123400039989 is an equidigital number, since it uses as much as digits as its factorization.

1123400039989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 1123400039989 in words is "one trillion, one hundred twenty-three billion, four hundred million, thirty-nine thousand, nine hundred eighty-nine".