1123103491 has 2 divisors, whose sum is σ = 1123103492. Its totient is φ = 1123103490.

The previous prime is 1123103441. The next prime is 1123103519. The reversal of 1123103491 is 1943013211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123103491 - 2¹⁷ = 1122972419 is a prime.

It is a super-2 number, since 2×1123103491² = 2522722902992774162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123103411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561551745 + 561551746.

It is an arithmetic number, because the mean of its divisors is an integer number (561551746).

Almost surely, 2^1123103491 is an apocalyptic number.

1123103491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123103491 is an equidigital number, since it uses as much as digits as its factorization.

1123103491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1123103491 is about 33512.7362505660. The cubic root of 1123103491 is about 1039.4571535229.

The spelling of 1123103491 in words is "one billion, one hundred twenty-three million, one hundred three thousand, four hundred ninety-one".