621213606 has 24 divisors (see below), whose sum is σ = 1449498960. Its totient is φ = 191142576.

The previous prime is 621213589. The next prime is 621213613. The reversal of 621213606 is 606312126.

621213606 is a `hidden beast` number, since 621 + 2 + 1 + 36 + 0 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 621213606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1327146 + ... + 1327613.

It is an arithmetic number, because the mean of its divisors is an integer number (60395790).

Almost surely, 2^621213606 is an apocalyptic number.

621213606 is an abundant number, since it is smaller than the sum of its proper divisors (828285354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621213606 is a wasteful number, since it uses less digits than its factorization.

621213606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654780 (or 2654777 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 621213606 is about 24924.1570770207. The cubic root of 621213606 is about 853.2579035228.

The spelling of 621213606 in words is "six hundred twenty-one million, two hundred thirteen thousand, six hundred six".