999937243 has 2 divisors, whose sum is σ = 999937244. Its totient is φ = 999937242.

The previous prime is 999937231. The next prime is 999937277. The reversal of 999937243 is 342739999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999937243 is a prime.

It is not a weakly prime, because it can be changed into another prime (999937223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499968621 + 499968622.

It is an arithmetic number, because the mean of its divisors is an integer number (499968622).

Almost surely, 2^999937243 is an apocalyptic number.

999937243 is a deficient number, since it is larger than the sum of its proper divisors (1).

999937243 is an equidigital number, since it uses as much as digits as its factorization.

999937243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 55.

The square root of 999937243 is about 31621.7843108197. The cubic root of 999937243 is about 999.9790805624.

The spelling of 999937243 in words is "nine hundred ninety-nine million, nine hundred thirty-seven thousand, two hundred forty-three".