1622839 has 2 divisors, whose sum is σ = 1622840. Its totient is φ = 1622838.

The previous prime is 1622833. The next prime is 1622849. The reversal of 1622839 is 9382261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1622839 - 2⁷ = 1622711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1622839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1622833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811419 + 811420.

It is an arithmetic number, because the mean of its divisors is an integer number (811420).

2^1622839 is an apocalyptic number.

1622839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622839 is an equidigital number, since it uses as much as digits as its factorization.

1622839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 1622839 is about 1273.9069824756. The cubic root of 1622839 is about 117.5145960440.

The spelling of 1622839 in words is "one million, six hundred twenty-two thousand, eight hundred thirty-nine".