622647813 has 8 divisors (see below), whose sum is σ = 832867776. Its totient is φ = 413763200.

The previous prime is 622647787. The next prime is 622647833. The reversal of 622647813 is 318746226.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 622647813 - 2⁶ = 622647749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622647833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332748 + ... + 334613.

It is an arithmetic number, because the mean of its divisors is an integer number (104108472).

Almost surely, 2^622647813 is an apocalyptic number.

It is an amenable number.

622647813 is a deficient number, since it is larger than the sum of its proper divisors (210219963).

622647813 is a wasteful number, since it uses less digits than its factorization.

622647813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667675.

The product of its digits is 96768, while the sum is 39.

The square root of 622647813 is about 24952.9119142436. The cubic root of 622647813 is about 853.9140427793.

The spelling of 622647813 in words is "six hundred twenty-two million, six hundred forty-seven thousand, eight hundred thirteen".