1123111447 has 2 divisors, whose sum is σ = 1123111448. Its totient is φ = 1123111446.

The previous prime is 1123111411. The next prime is 1123111463. The reversal of 1123111447 is 7441113211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123111447 - 2²³ = 1114722839 is a prime.

It is a super-2 number, since 2×1123111447² = 2522758644764867618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123111487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561555723 + 561555724.

It is an arithmetic number, because the mean of its divisors is an integer number (561555724).

Almost surely, 2^1123111447 is an apocalyptic number.

1123111447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123111447 is an equidigital number, since it uses as much as digits as its factorization.

1123111447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 25.

The square root of 1123111447 is about 33512.8549514959. The cubic root of 1123111447 is about 1039.4596080019.

Adding to 1123111447 its reverse (7441113211), we get a palindrome (8564224658).

The spelling of 1123111447 in words is "one billion, one hundred twenty-three million, one hundred eleven thousand, four hundred forty-seven".