981143243413 has 4 divisors (see below), whose sum is σ = 981164201760. Its totient is φ = 981122285068.

The previous prime is 981143243411. The next prime is 981143243449. The reversal of 981143243413 is 314342341189.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 981143243413 - 2¹ = 981143243411 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 981143243413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981143243411) 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, 10408795 + ... + 10502632.

It is an arithmetic number, because the mean of its divisors is an integer number (245291050440).

Almost surely, 2^981143243413 is an apocalyptic number.

It is an amenable number.

981143243413 is a deficient number, since it is larger than the sum of its proper divisors (20958347).

981143243413 is a wasteful number, since it uses less digits than its factorization.

981143243413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20958346.

The product of its digits is 248832, while the sum is 43.

The spelling of 981143243413 in words is "nine hundred eighty-one billion, one hundred forty-three million, two hundred forty-three thousand, four hundred thirteen".