1121423447 has 2 divisors, whose sum is σ = 1121423448. Its totient is φ = 1121423446.

The previous prime is 1121423389. The next prime is 1121423467. The reversal of 1121423447 is 7443241211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121423447 - 2⁶ = 1121423383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121423467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560711723 + 560711724.

It is an arithmetic number, because the mean of its divisors is an integer number (560711724).

Almost surely, 2^1121423447 is an apocalyptic number.

1121423447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121423447 is an equidigital number, since it uses as much as digits as its factorization.

1121423447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 29.

The square root of 1121423447 is about 33487.6611157005. The cubic root of 1121423447 is about 1038.9385888880.

Adding to 1121423447 its reverse (7443241211), we get a palindrome (8564664658).

The spelling of 1121423447 in words is "one billion, one hundred twenty-one million, four hundred twenty-three thousand, four hundred forty-seven".