9999049 has 2 divisors, whose sum is σ = 9999050. Its totient is φ = 9999048.

The previous prime is 9999047. The next prime is 9999053. The reversal of 9999049 is 9409999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9966649 + 32400 = 3157^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999049 - 2¹ = 9999047 is a prime.

Together with 9999047, it forms a pair of twin primes.

9999049 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9998993 and 9999011.

It is not a weakly prime, because it can be changed into another prime (9999047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999524 + 4999525.

It is an arithmetic number, because the mean of its divisors is an integer number (4999525).

Almost surely, 2^9999049 is an apocalyptic number.

It is an amenable number.

9999049 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999049 is an equidigital number, since it uses as much as digits as its factorization.

9999049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 9999049 is about 3162.1272902905. The cubic root of 9999049 is about 215.4366392287.

The spelling of 9999049 in words is "nine million, nine hundred ninety-nine thousand, forty-nine".