2983940393893 has 4 divisors (see below), whose sum is σ = 2984381746668. Its totient is φ = 2983499041120.

The previous prime is 2983940393869. The next prime is 2983940393921. The reversal of 2983940393893 is 3983930493892.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2387266026084 + 596674367809 = 1545078^2 + 772447^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2983940393893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2983940393393) 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, 220666246 + ... + 220679767.

It is an arithmetic number, because the mean of its divisors is an integer number (746095436667).

Almost surely, 2^{2983940393893} is an apocalyptic number.

It is an amenable number.

2983940393893 is a deficient number, since it is larger than the sum of its proper divisors (441352775).

2983940393893 is an equidigital number, since it uses as much as digits as its factorization.

2983940393893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441352774.

The product of its (nonzero) digits is 272097792, while the sum is 70.

Subtracting 2983940393893 from its reverse (3983930493892), we obtain a palindrome (999990099999).

The spelling of 2983940393893 in words is "two trillion, nine hundred eighty-three billion, nine hundred forty million, three hundred ninety-three thousand, eight hundred ninety-three".