999948289 has 2 divisors, whose sum is σ = 999948290. Its totient is φ = 999948288.

The previous prime is 999948269. The next prime is 999948317. The reversal of 999948289 is 982849999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999634689 + 313600 = 31617^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 999948289 - 2¹⁹ = 999424001 is a prime.

It is not a weakly prime, because it can be changed into another prime (999948259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499974144 + 499974145.

It is an arithmetic number, because the mean of its divisors is an integer number (499974145).

It is a Proth number, since it is equal to 7629 ⋅ 2¹⁷ + 1 and 7629 < 2¹⁷.

Almost surely, 2^999948289 is an apocalyptic number.

It is an amenable number.

999948289 is a deficient number, since it is larger than the sum of its proper divisors (1).

999948289 is an equidigital number, since it uses as much as digits as its factorization.

999948289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30233088, while the sum is 67.

The square root of 999948289 is about 31621.9589684131. The cubic root of 999948289 is about 999.9827627029.

The spelling of 999948289 in words is "nine hundred ninety-nine million, nine hundred forty-eight thousand, two hundred eighty-nine".