622494409 has 4 divisors (see below), whose sum is σ = 622758016. Its totient is φ = 622230804.

The previous prime is 622494407. The next prime is 622494413. The reversal of 622494409 is 904494226.

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 622494409 - 2¹ = 622494407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622494407) 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, 128229 + ... + 132994.

It is an arithmetic number, because the mean of its divisors is an integer number (155689504).

Almost surely, 2^622494409 is an apocalyptic number.

It is an amenable number.

622494409 is a deficient number, since it is larger than the sum of its proper divisors (263607).

622494409 is a wasteful number, since it uses less digits than its factorization.

622494409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263606.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 622494409 is about 24949.8378551846. The cubic root of 622494409 is about 853.8439097194.

The spelling of 622494409 in words is "six hundred twenty-two million, four hundred ninety-four thousand, four hundred nine".