999838699 has 2 divisors, whose sum is σ = 999838700. Its totient is φ = 999838698.

The previous prime is 999838687. The next prime is 999838703. The reversal of 999838699 is 996838999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999838699 - 2¹⁵ = 999805931 is a prime.

It is not a weakly prime, because it can be changed into another prime (999838639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499919349 + 499919350.

It is an arithmetic number, because the mean of its divisors is an integer number (499919350).

Almost surely, 2^999838699 is an apocalyptic number.

999838699 is a deficient number, since it is larger than the sum of its proper divisors (1).

999838699 is an equidigital number, since it uses as much as digits as its factorization.

999838699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68024448, while the sum is 70.

The square root of 999838699 is about 31620.2261060860. The cubic root of 999838699 is about 999.9462301089.

The spelling of 999838699 in words is "nine hundred ninety-nine million, eight hundred thirty-eight thousand, six hundred ninety-nine".