622787009 has 4 divisors (see below), whose sum is σ = 670693716. Its totient is φ = 574880304.

The previous prime is 622786999. The next prime is 622787021. The reversal of 622787009 is 900787226.

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

It can be written as a sum of positive squares in 2 ways, for example, as 325983025 + 296803984 = 18055^2 + 17228^2 .

It is a cyclic number.

It is not a de Polignac number, because 622787009 - 2⁸ = 622786753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622787069) 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, 23953334 + ... + 23953359.

It is an arithmetic number, because the mean of its divisors is an integer number (167673429).

Almost surely, 2^622787009 is an apocalyptic number.

It is an amenable number.

622787009 is a deficient number, since it is larger than the sum of its proper divisors (47906707).

622787009 is a wasteful number, since it uses less digits than its factorization.

622787009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47906706.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 622787009 is about 24955.7009318512. The cubic root of 622787009 is about 853.9776702749.

The spelling of 622787009 in words is "six hundred twenty-two million, seven hundred eighty-seven thousand, nine".