622761949 has 2 divisors, whose sum is σ = 622761950. Its totient is φ = 622761948.

The previous prime is 622761929. The next prime is 622761973. The reversal of 622761949 is 949167226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388365849 + 234396100 = 19707^2 + 15310^2 .

It is a cyclic number.

It is not a de Polignac number, because 622761949 - 2¹¹ = 622759901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 622761899 and 622761908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622761929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311380974 + 311380975.

It is an arithmetic number, because the mean of its divisors is an integer number (311380975).

Almost surely, 2^622761949 is an apocalyptic number.

It is an amenable number.

622761949 is a deficient number, since it is larger than the sum of its proper divisors (1).

622761949 is an equidigital number, since it uses as much as digits as its factorization.

622761949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 622761949 is about 24955.1988371161. The cubic root of 622761949 is about 853.9662158680.

The spelling of 622761949 in words is "six hundred twenty-two million, seven hundred sixty-one thousand, nine hundred forty-nine".