1123783949 has 2 divisors, whose sum is σ = 1123783950. Its totient is φ = 1123783948.

The previous prime is 1123783919. The next prime is 1123783951. The reversal of 1123783949 is 9493873211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 795522025 + 328261924 = 28205^2 + 18118^2 .

It is an emirp because it is prime and its reverse (9493873211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123783949 - 2⁸ = 1123783693 is a prime.

Together with 1123783951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123783919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561891974 + 561891975.

It is an arithmetic number, because the mean of its divisors is an integer number (561891975).

Almost surely, 2^1123783949 is an apocalyptic number.

It is an amenable number.

1123783949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123783949 is an equidigital number, since it uses as much as digits as its factorization.

1123783949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 1123783949 is about 33522.8869431020. The cubic root of 1123783949 is about 1039.6670374572.

The spelling of 1123783949 in words is "one billion, one hundred twenty-three million, seven hundred eighty-three thousand, nine hundred forty-nine".