1123156439 has 2 divisors, whose sum is σ = 1123156440. Its totient is φ = 1123156438.

The previous prime is 1123156421. The next prime is 1123156451. The reversal of 1123156439 is 9346513211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123156439 - 2⁸ = 1123156183 is a prime.

It is a super-2 number, since 2×1123156439² = 2522960772934321442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123156399 and 1123156408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123156409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561578219 + 561578220.

It is an arithmetic number, because the mean of its divisors is an integer number (561578220).

Almost surely, 2^1123156439 is an apocalyptic number.

1123156439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123156439 is an equidigital number, since it uses as much as digits as its factorization.

1123156439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 1123156439 is about 33513.5262095769. The cubic root of 1123156439 is about 1039.4734881151.

The spelling of 1123156439 in words is "one billion, one hundred twenty-three million, one hundred fifty-six thousand, four hundred thirty-nine".