622731 has 8 divisors (see below), whose sum is σ = 834624. Its totient is φ = 413000.

The previous prime is 622729. The next prime is 622751. The reversal of 622731 is 137226.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 622731 - 2¹ = 622729 is a prime.

It is a super-2 number, since 2×622731² = 775587796722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 622698 and 622707.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 622731.

It is not an unprimeable number, because it can be changed into a prime (622751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340 + ... + 1166.

It is an arithmetic number, because the mean of its divisors is an integer number (104328).

2⁶²²⁷³¹ is an apocalyptic number.

622731 is a deficient number, since it is larger than the sum of its proper divisors (211893).

622731 is a wasteful number, since it uses less digits than its factorization.

622731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081.

The product of its digits is 504, while the sum is 21.

The square root of 622731 is about 789.1330686266. The cubic root of 622731 is about 85.3952069297.

Adding to 622731 its reverse (137226), we get a palindrome (759957).

The spelling of 622731 in words is "six hundred twenty-two thousand, seven hundred thirty-one".