622843309 has 4 divisors (see below), whose sum is σ = 679465440. Its totient is φ = 566221180.

The previous prime is 622843303. The next prime is 622843339. The reversal of 622843309 is 903348226.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 622843309 - 2³ = 622843301 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 (622843301) 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, 28311049 + ... + 28311070.

It is an arithmetic number, because the mean of its divisors is an integer number (169866360).

Almost surely, 2^622843309 is an apocalyptic number.

It is an amenable number.

622843309 is a deficient number, since it is larger than the sum of its proper divisors (56622131).

622843309 is a wasteful number, since it uses less digits than its factorization.

622843309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56622130.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 622843309 is about 24956.8289051314. The cubic root of 622843309 is about 854.0034027181.

The spelling of 622843309 in words is "six hundred twenty-two million, eight hundred forty-three thousand, three hundred nine".