1312020343 has 4 divisors (see below), whose sum is σ = 1342532488. Its totient is φ = 1281508200.

The previous prime is 1312020329. The next prime is 1312020361. The reversal of 1312020343 is 3430202131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312020343 is a prime.

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 1312020343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312020323) 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, 15256008 + ... + 15256093.

It is an arithmetic number, because the mean of its divisors is an integer number (335633122).

Almost surely, 2^1312020343 is an apocalyptic number.

1312020343 is a deficient number, since it is larger than the sum of its proper divisors (30512145).

1312020343 is an equidigital number, since it uses as much as digits as its factorization.

1312020343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30512144.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1312020343 is about 36221.8213650280. The cubic root of 1312020343 is about 1094.7463930379.

Adding to 1312020343 its reverse (3430202131), we get a palindrome (4742222474).

The spelling of 1312020343 in words is "one billion, three hundred twelve million, twenty thousand, three hundred forty-three".