8449999 has 2 divisors, whose sum is σ = 8450000. Its totient is φ = 8449998.

The previous prime is 8449979. The next prime is 8450009. The reversal of 8449999 is 9999448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8449999 - 2⁵ = 8449967 is a prime.

It is an Ulam number.

8449999 is a modest number, since divided by 9999 gives 844 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8449979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4224999 + 4225000.

It is an arithmetic number, because the mean of its divisors is an integer number (4225000).

Almost surely, 2^8449999 is an apocalyptic number.

8449999 is a deficient number, since it is larger than the sum of its proper divisors (1).

8449999 is an equidigital number, since it uses as much as digits as its factorization.

8449999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 52.

The square root of 8449999 is about 2906.8881987445. Note that the first 3 decimals coincide. The cubic root of 8449999 is about 203.6817975900.

The spelling of 8449999 in words is "eight million, four hundred forty-nine thousand, nine hundred ninety-nine".