1123431307 has 2 divisors, whose sum is σ = 1123431308. Its totient is φ = 1123431306.

The previous prime is 1123431299. The next prime is 1123431317. The reversal of 1123431307 is 7031343211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123431307 - 2³ = 1123431299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123431317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561715653 + 561715654.

It is an arithmetic number, because the mean of its divisors is an integer number (561715654).

Almost surely, 2^1123431307 is an apocalyptic number.

1123431307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123431307 is an equidigital number, since it uses as much as digits as its factorization.

1123431307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1123431307 is about 33517.6268103814. The cubic root of 1123431307 is about 1039.5582773407.

Adding to 1123431307 its reverse (7031343211), we get a palindrome (8154774518).

The spelling of 1123431307 in words is "one billion, one hundred twenty-three million, four hundred thirty-one thousand, three hundred seven".