622747 has 4 divisors (see below), whose sum is σ = 639616. Its totient is φ = 605880.

The previous prime is 622729. The next prime is 622751. The reversal of 622747 is 747226.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747226 = 2 ⋅373613.

It is a cyclic number.

It is not a de Polignac number, because 622747 - 2⁷ = 622619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622777) 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, 8379 + ... + 8452.

It is an arithmetic number, because the mean of its divisors is an integer number (159904).

2⁶²²⁷⁴⁷ is an apocalyptic number.

622747 is a deficient number, since it is larger than the sum of its proper divisors (16869).

622747 is a wasteful number, since it uses less digits than its factorization.

622747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16868.

The product of its digits is 4704, while the sum is 28.

The square root of 622747 is about 789.1432062687. The cubic root of 622747 is about 85.3959382843.

It can be divided in two parts, 622 and 747, that added together give a square (1369 = 37²).

The spelling of 622747 in words is "six hundred twenty-two thousand, seven hundred forty-seven".