999849239 has 2 divisors, whose sum is σ = 999849240. Its totient is φ = 999849238.

The previous prime is 999849233. The next prime is 999849251. The reversal of 999849239 is 932948999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999849239 - 2¹⁶ = 999783703 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999849233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499924619 + 499924620.

It is an arithmetic number, because the mean of its divisors is an integer number (499924620).

Almost surely, 2^999849239 is an apocalyptic number.

999849239 is a deficient number, since it is larger than the sum of its proper divisors (1).

999849239 is an equidigital number, since it uses as much as digits as its factorization.

999849239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11337408, while the sum is 62.

The square root of 999849239 is about 31620.3927711216. The cubic root of 999849239 is about 999.9497438077.

The spelling of 999849239 in words is "nine hundred ninety-nine million, eight hundred forty-nine thousand, two hundred thirty-nine".