999998369 has 2 divisors, whose sum is σ = 999998370. Its totient is φ = 999998368.

The previous prime is 999998339. The next prime is 999998423. The reversal of 999998369 is 963899999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961744144 + 38254225 = 31012^2 + 6185^2 .

It is a cyclic number.

It is not a de Polignac number, because 999998369 - 2¹² = 999994273 is a prime.

It is a super-2 number, since 2×999998369² = 1999993476005320322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999998309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999184 + 499999185.

It is an arithmetic number, because the mean of its divisors is an integer number (499999185).

Almost surely, 2^999998369 is an apocalyptic number.

It is an amenable number.

999998369 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998369 is an equidigital number, since it uses as much as digits as its factorization.

999998369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76527504, while the sum is 71.

The square root of 999998369 is about 31622.7508132990. The cubic root of 999998369 is about 999.9994563330. Note that the first 3 decimals are identical.

The spelling of 999998369 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, three hundred sixty-nine".