8423244649 has 4 divisors (see below), whose sum is σ = 8538631636. Its totient is φ = 8307857664.

The previous prime is 8423244617. The next prime is 8423244659. The reversal of 8423244649 is 9464423248.

It is a happy number.

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 1932042025 + 6491202624 = 43955^2 + 80568^2 .

It is a cyclic number.

It is not a de Polignac number, because 8423244649 - 2⁵ = 8423244617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8423244599 and 8423244608.

It is not an unprimeable number, because it can be changed into a prime (8423244659) 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, 57693384 + ... + 57693529.

It is an arithmetic number, because the mean of its divisors is an integer number (2134657909).

Almost surely, 2^8423244649 is an apocalyptic number.

It is an amenable number.

8423244649 is a deficient number, since it is larger than the sum of its proper divisors (115386987).

8423244649 is a wasteful number, since it uses less digits than its factorization.

8423244649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115386986.

The product of its digits is 1327104, while the sum is 46.

The square root of 8423244649 is about 91778.2362491239. The cubic root of 8423244649 is about 2034.6660483460. Note that the first 3 decimals are identical.

It can be divided in two parts, 84232 and 44649, that added together give a square (128881 = 359²).

The spelling of 8423244649 in words is "eight billion, four hundred twenty-three million, two hundred forty-four thousand, six hundred forty-nine".