11123457949 has 2 divisors, whose sum is σ = 11123457950. Its totient is φ = 11123457948.

The previous prime is 11123457929. The next prime is 11123458009. The reversal of 11123457949 is 94975432111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8479647225 + 2643810724 = 92085^2 + 51418^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123457949 - 2¹¹ = 11123455901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11123457899 and 11123457908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11123457929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561728974 + 5561728975.

It is an arithmetic number, because the mean of its divisors is an integer number (5561728975).

Almost surely, 2^11123457949 is an apocalyptic number.

It is an amenable number.

11123457949 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123457949 is an equidigital number, since it uses as much as digits as its factorization.

11123457949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The spelling of 11123457949 in words is "eleven billion, one hundred twenty-three million, four hundred fifty-seven thousand, nine hundred forty-nine".