8205979749 has 16 divisors (see below), whose sum is σ = 12564180480. Its totient is φ = 4711566960.

The previous prime is 8205979741. The next prime is 8205979763. The reversal of 8205979749 is 9479795028.

It is not a de Polignac number, because 8205979749 - 2³ = 8205979741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8205979692 and 8205979701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8205979741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6543217 + ... + 6544470.

It is an arithmetic number, because the mean of its divisors is an integer number (785261280).

Almost surely, 2^8205979749 is an apocalyptic number.

It is an amenable number.

8205979749 is a deficient number, since it is larger than the sum of its proper divisors (4358200731).

8205979749 is a wasteful number, since it uses less digits than its factorization.

8205979749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13087720.

The product of its (nonzero) digits is 11430720, while the sum is 60.

The square root of 8205979749 is about 90586.8630045218. The cubic root of 8205979749 is about 2017.0197325906.

The spelling of 8205979749 in words is "eight billion, two hundred five million, nine hundred seventy-nine thousand, seven hundred forty-nine".