999506243 has 2 divisors, whose sum is σ = 999506244. Its totient is φ = 999506242.

The previous prime is 999506237. The next prime is 999506269. The reversal of 999506243 is 342605999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999506243 - 2⁴ = 999506227 is a prime.

It is not a weakly prime, because it can be changed into another prime (999506213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499753121 + 499753122.

It is an arithmetic number, because the mean of its divisors is an integer number (499753122).

Almost surely, 2^999506243 is an apocalyptic number.

999506243 is a deficient number, since it is larger than the sum of its proper divisors (1).

999506243 is an equidigital number, since it uses as much as digits as its factorization.

999506243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 999506243 is about 31614.9686541043. The cubic root of 999506243 is about 999.8353872375.

The spelling of 999506243 in words is "nine hundred ninety-nine million, five hundred six thousand, two hundred forty-three".