622709 has 2 divisors, whose sum is σ = 622710. Its totient is φ = 622708.

The previous prime is 622669. The next prime is 622723. The reversal of 622709 is 907226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485809 + 136900 = 697^2 + 370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311354 + 311355.

It is an arithmetic number, because the mean of its divisors is an integer number (311355).

2⁶²²⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

622709 is a deficient number, since it is larger than the sum of its proper divisors (1).

622709 is an equidigital number, since it uses as much as digits as its factorization.

622709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 622709 is about 789.1191291560. The cubic root of 622709 is about 85.3942012966.

It can be divided in two parts, 622 and 709, that added together give a palindrome (1331).

The spelling of 622709 in words is "six hundred twenty-two thousand, seven hundred nine".