1123420447 has 2 divisors, whose sum is σ = 1123420448. Its totient is φ = 1123420446.

The previous prime is 1123420427. The next prime is 1123420453. The reversal of 1123420447 is 7440243211.

It is a strong prime.

It is an emirp because it is prime and its reverse (7440243211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123420447 - 2¹⁵ = 1123387679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123420427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561710223 + 561710224.

It is an arithmetic number, because the mean of its divisors is an integer number (561710224).

Almost surely, 2^1123420447 is an apocalyptic number.

1123420447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123420447 is an equidigital number, since it uses as much as digits as its factorization.

1123420447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 1123420447 is about 33517.4648056800. The cubic root of 1123420447 is about 1039.5549275916.

Adding to 1123420447 its reverse (7440243211), we get a palindrome (8563663658).

The spelling of 1123420447 in words is "one billion, one hundred twenty-three million, four hundred twenty thousand, four hundred forty-seven".