1316400843 has 4 divisors (see below), whose sum is σ = 1755201128. Its totient is φ = 877600560.

The previous prime is 1316400823. The next prime is 1316400851. The reversal of 1316400843 is 3480046131.

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

It is not a de Polignac number, because 1316400843 - 2⁸ = 1316400587 is a prime.

It is a super-2 number, since 2×1316400843² = 3465822358902221298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1316400843.

It is not an unprimeable number, because it can be changed into a prime (1316400823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219400138 + ... + 219400143.

It is an arithmetic number, because the mean of its divisors is an integer number (438800282).

Almost surely, 2^1316400843 is an apocalyptic number.

1316400843 is a deficient number, since it is larger than the sum of its proper divisors (438800285).

1316400843 is an equidigital number, since it uses as much as digits as its factorization.

1316400843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438800284.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1316400843 is about 36282.2386712838. The cubic root of 1316400843 is about 1095.9633989211.

Adding to 1316400843 its reverse (3480046131), we get a palindrome (4796446974).

The spelling of 1316400843 in words is "one billion, three hundred sixteen million, four hundred thousand, eight hundred forty-three".