1243232313 has 16 divisors (see below), whose sum is σ = 1677589056. Its totient is φ = 818904320.

The previous prime is 1243232311. The next prime is 1243232327. The reversal of 1243232313 is 3132323421.

It is a cyclic number.

It is not a de Polignac number, because 1243232313 - 2¹ = 1243232311 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1243232311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84781 + ... + 98357.

It is an arithmetic number, because the mean of its divisors is an integer number (104849316).

Almost surely, 2^1243232313 is an apocalyptic number.

It is an amenable number.

1243232313 is a deficient number, since it is larger than the sum of its proper divisors (434356743).

1243232313 is a wasteful number, since it uses less digits than its factorization.

1243232313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13944.

The product of its digits is 2592, while the sum is 24.

The square root of 1243232313 is about 35259.4996135793. The cubic root of 1243232313 is about 1075.2697539733.

Adding to 1243232313 its reverse (3132323421), we get a palindrome (4375555734).

The spelling of 1243232313 in words is "one billion, two hundred forty-three million, two hundred thirty-two thousand, three hundred thirteen".