622391 has 16 divisors (see below), whose sum is σ = 794880. Its totient is φ = 473280.

The previous prime is 622367. The next prime is 622397. The reversal of 622391 is 193226.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4475 + ... + 4611.

It is an arithmetic number, because the mean of its divisors is an integer number (49680).

2⁶²²³⁹¹ is an apocalyptic number.

622391 is a deficient number, since it is larger than the sum of its proper divisors (172489).

622391 is a wasteful number, since it uses less digits than its factorization.

622391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214.

The product of its digits is 648, while the sum is 23.

The square root of 622391 is about 788.9176129356. The cubic root of 622391 is about 85.3796626813.

The spelling of 622391 in words is "six hundred twenty-two thousand, three hundred ninety-one".