999530647 has 2 divisors, whose sum is σ = 999530648. Its totient is φ = 999530646.

The previous prime is 999530641. The next prime is 999530659. The reversal of 999530647 is 746035999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999530647 - 2¹¹ = 999528599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999530594 and 999530603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999530641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499765323 + 499765324.

It is an arithmetic number, because the mean of its divisors is an integer number (499765324).

Almost surely, 2^999530647 is an apocalyptic number.

999530647 is a deficient number, since it is larger than the sum of its proper divisors (1).

999530647 is an equidigital number, since it uses as much as digits as its factorization.

999530647 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 52.

The square root of 999530647 is about 31615.3546081647. The cubic root of 999530647 is about 999.8435245167.

The spelling of 999530647 in words is "nine hundred ninety-nine million, five hundred thirty thousand, six hundred forty-seven".