8399927649 has 4 divisors (see below), whose sum is σ = 11199903536. Its totient is φ = 5599951764.

The previous prime is 8399927639. The next prime is 8399927729. The reversal of 8399927649 is 9467299938.

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 not a de Polignac number, because 8399927649 - 2¹³ = 8399919457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8399927649.

It is not an unprimeable number, because it can be changed into a prime (8399927629) 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, 1399987939 + ... + 1399987944.

It is an arithmetic number, because the mean of its divisors is an integer number (2799975884).

Almost surely, 2^8399927649 is an apocalyptic number.

It is an amenable number.

8399927649 is a deficient number, since it is larger than the sum of its proper divisors (2799975887).

8399927649 is a wasteful number, since it uses less digits than its factorization.

8399927649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799975886.

The product of its digits is 52907904, while the sum is 66.

The square root of 8399927649 is about 91651.1191912025. The cubic root of 8399927649 is about 2032.7868773199.

The spelling of 8399927649 in words is "eight billion, three hundred ninety-nine million, nine hundred twenty-seven thousand, six hundred forty-nine".