999997249 has 2 divisors, whose sum is σ = 999997250. Its totient is φ = 999997248.

The previous prime is 999997241. The next prime is 999997267. The reversal of 999997249 is 942799999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 820249600 + 179747649 = 28640^2 + 13407^2 .

It is a cyclic number.

It is not a de Polignac number, because 999997249 - 2³ = 999997241 is a prime.

It is not a weakly prime, because it can be changed into another prime (999997241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998624 + 499998625.

It is an arithmetic number, because the mean of its divisors is an integer number (499998625).

Almost surely, 2^999997249 is an apocalyptic number.

It is an amenable number.

999997249 is a deficient number, since it is larger than the sum of its proper divisors (1).

999997249 is an equidigital number, since it uses as much as digits as its factorization.

999997249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29760696, while the sum is 67.

The square root of 999997249 is about 31622.7331045247. The cubic root of 999997249 is about 999.9990829992. Note that the first 3 decimals are identical.

The spelling of 999997249 in words is "nine hundred ninety-nine million, nine hundred ninety-seven thousand, two hundred forty-nine".