1231323349 has 2 divisors, whose sum is σ = 1231323350. Its totient is φ = 1231323348.

The previous prime is 1231323347. The next prime is 1231323419. The reversal of 1231323349 is 9433231321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1189008324 + 42315025 = 34482^2 + 6505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231323349 - 2¹ = 1231323347 is a prime.

Together with 1231323347, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1231323349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231323341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615661674 + 615661675.

It is an arithmetic number, because the mean of its divisors is an integer number (615661675).

Almost surely, 2^1231323349 is an apocalyptic number.

It is an amenable number.

1231323349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231323349 is an equidigital number, since it uses as much as digits as its factorization.

1231323349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 31.

The square root of 1231323349 is about 35090.2172834538. The cubic root of 1231323349 is about 1071.8253841994.

The spelling of 1231323349 in words is "one billion, two hundred thirty-one million, three hundred twenty-three thousand, three hundred forty-nine".