1243413331 has 2 divisors, whose sum is σ = 1243413332. Its totient is φ = 1243413330.

The previous prime is 1243413293. The next prime is 1243413359. The reversal of 1243413331 is 1333143421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243413331 - 2¹¹ = 1243411283 is a prime.

It is a super-2 number, since 2×1243413331² = 3092153423417031122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1243413296 and 1243413305.

It is not a weakly prime, because it can be changed into another prime (1243414331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621706665 + 621706666.

It is an arithmetic number, because the mean of its divisors is an integer number (621706666).

Almost surely, 2^1243413331 is an apocalyptic number.

1243413331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243413331 is an equidigital number, since it uses as much as digits as its factorization.

1243413331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 1243413331 is about 35262.0664595823. The cubic root of 1243413331 is about 1075.3219388391.

Adding to 1243413331 its reverse (1333143421), we get a palindrome (2576556752).

The spelling of 1243413331 in words is "one billion, two hundred forty-three million, four hundred thirteen thousand, three hundred thirty-one".