622649149 has 2 divisors, whose sum is σ = 622649150. Its totient is φ = 622649148.

The previous prime is 622649129. The next prime is 622649161. The reversal of 622649149 is 941946226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 551921049 + 70728100 = 23493^2 + 8410^2 .

It is a cyclic number.

It is not a de Polignac number, because 622649149 - 2⁵ = 622649117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622649129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311324574 + 311324575.

It is an arithmetic number, because the mean of its divisors is an integer number (311324575).

Almost surely, 2^622649149 is an apocalyptic number.

It is an amenable number.

622649149 is a deficient number, since it is larger than the sum of its proper divisors (1).

622649149 is an equidigital number, since it uses as much as digits as its factorization.

622649149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

The square root of 622649149 is about 24952.9386846520. The cubic root of 622649149 is about 853.9146535196.

The spelling of 622649149 in words is "six hundred twenty-two million, six hundred forty-nine thousand, one hundred forty-nine".