1231322293 has 2 divisors, whose sum is σ = 1231322294. Its totient is φ = 1231322292.

The previous prime is 1231322249. The next prime is 1231322321. The reversal of 1231322293 is 3922231321.

It is an a-pointer prime, because the next prime (1231322321) can be obtained adding 1231322293 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1197298404 + 34023889 = 34602^2 + 5833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231322293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231322233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615661146 + 615661147.

It is an arithmetic number, because the mean of its divisors is an integer number (615661147).

Almost surely, 2^1231322293 is an apocalyptic number.

It is an amenable number.

1231322293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231322293 is an equidigital number, since it uses as much as digits as its factorization.

1231322293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The square root of 1231322293 is about 35090.2022365218. The cubic root of 1231322293 is about 1071.8250777952.

The spelling of 1231322293 in words is "one billion, two hundred thirty-one million, three hundred twenty-two thousand, two hundred ninety-three".