530621999 has 4 divisors (see below), whose sum is σ = 530692680. Its totient is φ = 530551320.

The previous prime is 530621941. The next prime is 530622007. The reversal of 530621999 is 999126035.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 530621999 - 2¹² = 530617903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530621909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22532 + ... + 39609.

It is an arithmetic number, because the mean of its divisors is an integer number (132673170).

Almost surely, 2^530621999 is an apocalyptic number.

530621999 is a deficient number, since it is larger than the sum of its proper divisors (70681).

530621999 is an equidigital number, since it uses as much as digits as its factorization.

530621999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70680.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 530621999 is about 23035.2338603280. The cubic root of 530621999 is about 809.5836904537.

The spelling of 530621999 in words is "five hundred thirty million, six hundred twenty-one thousand, nine hundred ninety-nine".