999989203 has 2 divisors, whose sum is σ = 999989204. Its totient is φ = 999989202.

The previous prime is 999989201. The next prime is 999989219. The reversal of 999989203 is 302989999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999989203 - 2¹ = 999989201 is a prime.

It is a super-2 number, since 2×999989203² = 1999956812233150418, which contains 22 as substring.

Together with 999989201, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (999989201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499994601 + 499994602.

It is an arithmetic number, because the mean of its divisors is an integer number (499994602).

Almost surely, 2^999989203 is an apocalyptic number.

999989203 is a deficient number, since it is larger than the sum of its proper divisors (1).

999989203 is an equidigital number, since it uses as much as digits as its factorization.

999989203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2834352, while the sum is 58.

The square root of 999989203 is about 31622.6058856635. The cubic root of 999989203 is about 999.9964009870.

The spelling of 999989203 in words is "nine hundred ninety-nine million, nine hundred eighty-nine thousand, two hundred three".