1622227729 has 2 divisors, whose sum is σ = 1622227730. Its totient is φ = 1622227728.

The previous prime is 1622227727. The next prime is 1622227787. The reversal of 1622227729 is 9277222261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1212084225 + 410143504 = 34815^2 + 20252^2 .

It is a cyclic number.

It is not a de Polignac number, because 1622227729 - 2¹ = 1622227727 is a prime.

Together with 1622227727, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1622227691 and 1622227700.

It is not a weakly prime, because it can be changed into another prime (1622227727) 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, 811113864 + 811113865.

It is an arithmetic number, because the mean of its divisors is an integer number (811113865).

Almost surely, 2^1622227729 is an apocalyptic number.

It is an amenable number.

1622227729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622227729 is an equidigital number, since it uses as much as digits as its factorization.

1622227729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 1622227729 is about 40276.8882735496. Note that the first 3 decimals coincide. The cubic root of 1622227729 is about 1174.9983954105.

The spelling of 1622227729 in words is "one billion, six hundred twenty-two million, two hundred twenty-seven thousand, seven hundred twenty-nine".