1123623913 has 2 divisors, whose sum is σ = 1123623914. Its totient is φ = 1123623912.

The previous prime is 1123623911. The next prime is 1123623931. The reversal of 1123623913 is 3193263211.

Together with next prime (1123623931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972628969 + 150994944 = 31187^2 + 12288^2 .

It is an emirp because it is prime and its reverse (3193263211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123623913 - 2¹ = 1123623911 is a prime.

Together with 1123623911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1123623911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561811956 + 561811957.

It is an arithmetic number, because the mean of its divisors is an integer number (561811957).

Almost surely, 2^1123623913 is an apocalyptic number.

It is an amenable number.

1123623913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123623913 is an equidigital number, since it uses as much as digits as its factorization.

1123623913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 31.

The square root of 1123623913 is about 33520.4998918572. The cubic root of 1123623913 is about 1039.6176827590.

The spelling of 1123623913 in words is "one billion, one hundred twenty-three million, six hundred twenty-three thousand, nine hundred thirteen".