1622809109 has 2 divisors, whose sum is σ = 1622809110. Its totient is φ = 1622809108.

The previous prime is 1622809099. The next prime is 1622809163. The reversal of 1622809109 is 9019082261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1517336209 + 105472900 = 38953^2 + 10270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1622809109 - 2⁸ = 1622808853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1622809189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811404554 + 811404555.

It is an arithmetic number, because the mean of its divisors is an integer number (811404555).

Almost surely, 2^1622809109 is an apocalyptic number.

It is an amenable number.

1622809109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622809109 is an equidigital number, since it uses as much as digits as its factorization.

1622809109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1622809109 is about 40284.1049174485. The cubic root of 1622809109 is about 1175.1387454088.

The spelling of 1622809109 in words is "one billion, six hundred twenty-two million, eight hundred nine thousand, one hundred nine".