622723897 has 4 divisors (see below), whose sum is σ = 623137536. Its totient is φ = 622310260.

The previous prime is 622723861. The next prime is 622723901. The reversal of 622723897 is 798327226.

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, and also an emirpimes, since its reverse is a distinct semiprime: 798327226 = 2 ⋅399163613.

It is a cyclic number.

It is not a de Polignac number, because 622723897 - 2⁷ = 622723769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622723817) 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 3 ways as a sum of consecutive naturals, for example, 204553 + ... + 207574.

It is an arithmetic number, because the mean of its divisors is an integer number (155784384).

Almost surely, 2^622723897 is an apocalyptic number.

It is an amenable number.

622723897 is a deficient number, since it is larger than the sum of its proper divisors (413639).

622723897 is a wasteful number, since it uses less digits than its factorization.

622723897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413638.

The product of its digits is 508032, while the sum is 46.

The square root of 622723897 is about 24954.4364192021. The cubic root of 622723897 is about 853.9488224994.

The spelling of 622723897 in words is "six hundred twenty-two million, seven hundred twenty-three thousand, eight hundred ninety-seven".