999800597 has 2 divisors, whose sum is σ = 999800598. Its totient is φ = 999800596.

The previous prime is 999800587. The next prime is 999800687. The reversal of 999800597 is 795008999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536431921 + 463368676 = 23161^2 + 21526^2 .

It is an emirp because it is prime and its reverse (795008999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999800597 - 2⁸ = 999800341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999800507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499900298 + 499900299.

It is an arithmetic number, because the mean of its divisors is an integer number (499900299).

Almost surely, 2^999800597 is an apocalyptic number.

It is an amenable number.

999800597 is a deficient number, since it is larger than the sum of its proper divisors (1).

999800597 is an equidigital number, since it uses as much as digits as its factorization.

999800597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1837080, while the sum is 56.

The square root of 999800597 is about 31619.6236062354. The cubic root of 999800597 is about 999.9335279149.

The spelling of 999800597 in words is "nine hundred ninety-nine million, eight hundred thousand, five hundred ninety-seven".