999800507 has 2 divisors, whose sum is σ = 999800508. Its totient is φ = 999800506.

The previous prime is 999800467. The next prime is 999800513. The reversal of 999800507 is 705008999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999800507 - 2¹⁰ = 999799483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999800567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499900253 + 499900254.

It is an arithmetic number, because the mean of its divisors is an integer number (499900254).

Almost surely, 2^999800507 is an apocalyptic number.

999800507 is a deficient number, since it is larger than the sum of its proper divisors (1).

999800507 is an equidigital number, since it uses as much as digits as its factorization.

999800507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 999800507 is about 31619.6221830685. The cubic root of 999800507 is about 999.9334979109.

The spelling of 999800507 in words is "nine hundred ninety-nine million, eight hundred thousand, five hundred seven".