8400996649 has 2 divisors, whose sum is σ = 8400996650. Its totient is φ = 8400996648.

The previous prime is 8400996599. The next prime is 8400996673. The reversal of 8400996649 is 9466990048.

8400996649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6653338624 + 1747658025 = 81568^2 + 41805^2 .

It is a cyclic number.

It is not a de Polignac number, because 8400996649 - 2²⁵ = 8367442217 is a prime.

It is a super-4 number, since 4×8400996649⁴ (a number of 41 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8400996649.

It is not a weakly prime, because it can be changed into another prime (8400996449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4200498324 + 4200498325.

It is an arithmetic number, because the mean of its divisors is an integer number (4200498325).

Almost surely, 2^8400996649 is an apocalyptic number.

It is an amenable number.

8400996649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8400996649 is an equidigital number, since it uses as much as digits as its factorization.

8400996649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The square root of 8400996649 is about 91656.9509039004. The cubic root of 8400996649 is about 2032.8731065148.

The spelling of 8400996649 in words is "eight billion, four hundred million, nine hundred ninety-six thousand, six hundred forty-nine".