999832397 has 2 divisors, whose sum is σ = 999832398. Its totient is φ = 999832396.

The previous prime is 999832387. The next prime is 999832399. The reversal of 999832397 is 793238999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 956417476 + 43414921 = 30926^2 + 6589^2 .

It is a cyclic number.

It is not a de Polignac number, because 999832397 - 2¹⁶ = 999766861 is a prime.

Together with 999832399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999832399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499916198 + 499916199.

It is an arithmetic number, because the mean of its divisors is an integer number (499916199).

Almost surely, 2^999832397 is an apocalyptic number.

It is an amenable number.

999832397 is a deficient number, since it is larger than the sum of its proper divisors (1).

999832397 is an equidigital number, since it uses as much as digits as its factorization.

999832397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6613488, while the sum is 59.

The square root of 999832397 is about 31620.1264545226. The cubic root of 999832397 is about 999.9441292118.

The spelling of 999832397 in words is "nine hundred ninety-nine million, eight hundred thirty-two thousand, three hundred ninety-seven".