999620563 has 2 divisors, whose sum is σ = 999620564. Its totient is φ = 999620562.

The previous prime is 999620507. The next prime is 999620623. The reversal of 999620563 is 365026999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999620563 - 2⁹ = 999620051 is a prime.

It is not a weakly prime, because it can be changed into another prime (999620263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499810281 + 499810282.

It is an arithmetic number, because the mean of its divisors is an integer number (499810282).

Almost surely, 2^999620563 is an apocalyptic number.

999620563 is a deficient number, since it is larger than the sum of its proper divisors (1).

999620563 is an equidigital number, since it uses as much as digits as its factorization.

999620563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 787320, while the sum is 49.

The square root of 999620563 is about 31616.7766067321. The cubic root of 999620563 is about 999.8735049997.

The spelling of 999620563 in words is "nine hundred ninety-nine million, six hundred twenty thousand, five hundred sixty-three".