8429477449 has 2 divisors, whose sum is σ = 8429477450. Its totient is φ = 8429477448.

The previous prime is 8429477447. The next prime is 8429477453. The reversal of 8429477449 is 9447749248.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6257917449 + 2171560000 = 79107^2 + 46600^2 .

It is a cyclic number.

It is not a de Polignac number, because 8429477449 - 2¹ = 8429477447 is a prime.

Together with 8429477447, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 8429477393 and 8429477402.

It is not a weakly prime, because it can be changed into another prime (8429477443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4214738724 + 4214738725.

It is an arithmetic number, because the mean of its divisors is an integer number (4214738725).

Almost surely, 2^8429477449 is an apocalyptic number.

It is an amenable number.

8429477449 is a deficient number, since it is larger than the sum of its proper divisors (1).

8429477449 is an equidigital number, since it uses as much as digits as its factorization.

8429477449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16257024, while the sum is 58.

The square root of 8429477449 is about 91812.1857326139. The cubic root of 8429477449 is about 2035.1677766157.

The spelling of 8429477449 in words is "eight billion, four hundred twenty-nine million, four hundred seventy-seven thousand, four hundred forty-nine".