1231326797 has 2 divisors, whose sum is σ = 1231326798. Its totient is φ = 1231326796.

The previous prime is 1231326791. The next prime is 1231326823. The reversal of 1231326797 is 7976231321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663886756 + 567440041 = 25766^2 + 23821^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231326797 - 2¹⁰ = 1231325773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231326791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615663398 + 615663399.

It is an arithmetic number, because the mean of its divisors is an integer number (615663399).

Almost surely, 2^1231326797 is an apocalyptic number.

It is an amenable number.

1231326797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231326797 is an equidigital number, since it uses as much as digits as its factorization.

1231326797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 41.

The square root of 1231326797 is about 35090.2664139217. The cubic root of 1231326797 is about 1071.8263846543.

The spelling of 1231326797 in words is "one billion, two hundred thirty-one million, three hundred twenty-six thousand, seven hundred ninety-seven".