622905949 has 2 divisors, whose sum is σ = 622905950. Its totient is φ = 622905948.

The previous prime is 622905929. The next prime is 622905961. The reversal of 622905949 is 949509226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 523265625 + 99640324 = 22875^2 + 9982^2 .

It is a cyclic number.

It is not a de Polignac number, because 622905949 - 2¹¹ = 622903901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 622905899 and 622905908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622905919) 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, 311452974 + 311452975.

It is an arithmetic number, because the mean of its divisors is an integer number (311452975).

Almost surely, 2^622905949 is an apocalyptic number.

It is an amenable number.

622905949 is a deficient number, since it is larger than the sum of its proper divisors (1).

622905949 is an equidigital number, since it uses as much as digits as its factorization.

622905949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 622905949 is about 24958.0838407118. The cubic root of 622905949 is about 854.0320310955.

The spelling of 622905949 in words is "six hundred twenty-two million, nine hundred five thousand, nine hundred forty-nine".