1311413443 has 4 divisors (see below), whose sum is σ = 1311958440. Its totient is φ = 1310868448.

The previous prime is 1311413423. The next prime is 1311413447. The reversal of 1311413443 is 3443141131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311413443 - 2⁹ = 1311412931 is a prime.

It is a super-2 number, since 2×1311413443² = 3439610436962228498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311413447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268873 + ... + 273706.

It is an arithmetic number, because the mean of its divisors is an integer number (327989610).

Almost surely, 2^1311413443 is an apocalyptic number.

1311413443 is a deficient number, since it is larger than the sum of its proper divisors (544997).

1311413443 is an equidigital number, since it uses as much as digits as its factorization.

1311413443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544996.

The product of its digits is 1728, while the sum is 25.

The square root of 1311413443 is about 36213.4428493067. The cubic root of 1311413443 is about 1094.5775684055.

Adding to 1311413443 its reverse (3443141131), we get a palindrome (4754554574).

The spelling of 1311413443 in words is "one billion, three hundred eleven million, four hundred thirteen thousand, four hundred forty-three".