1312988443 has 4 divisors (see below), whose sum is σ = 1413987568. Its totient is φ = 1211989320.

The previous prime is 1312988437. The next prime is 1312988497. The reversal of 1312988443 is 3448892131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3448892131 = 24169 ⋅142699.

It is a cyclic number.

It is not a de Polignac number, because 1312988443 - 2⁹ = 1312987931 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 1312988443.

It is not an unprimeable number, because it can be changed into a prime (1312988423) 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, 50499543 + ... + 50499568.

It is an arithmetic number, because the mean of its divisors is an integer number (353496892).

Almost surely, 2^1312988443 is an apocalyptic number.

1312988443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1312988443 is a deficient number, since it is larger than the sum of its proper divisors (100999125).

1312988443 is a wasteful number, since it uses less digits than its factorization.

1312988443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100999124.

The product of its digits is 165888, while the sum is 43.

The square root of 1312988443 is about 36235.1823922552. The cubic root of 1312988443 is about 1095.0155868871.

The spelling of 1312988443 in words is "one billion, three hundred twelve million, nine hundred eighty-eight thousand, four hundred forty-three".