8361986393 has 4 divisors (see below), whose sum is σ = 8802090960. Its totient is φ = 7921881828.

The previous prime is 8361986377. The next prime is 8361986419. The reversal of 8361986393 is 3936891638.

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 8361986393 - 2⁴ = 8361986377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8361986363) 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, 220052255 + ... + 220052292.

It is an arithmetic number, because the mean of its divisors is an integer number (2200522740).

Almost surely, 2^8361986393 is an apocalyptic number.

It is an amenable number.

8361986393 is a deficient number, since it is larger than the sum of its proper divisors (440104567).

8361986393 is a wasteful number, since it uses less digits than its factorization.

8361986393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440104566.

The product of its digits is 5038848, while the sum is 56.

The square root of 8361986393 is about 91443.8975164554. The cubic root of 8361986393 is about 2029.7216563694.

The spelling of 8361986393 in words is "eight billion, three hundred sixty-one million, nine hundred eighty-six thousand, three hundred ninety-three".