622625749 has 2 divisors, whose sum is σ = 622625750. Its totient is φ = 622625748.

The previous prime is 622625693. The next prime is 622625771. The reversal of 622625749 is 947526226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 411359524 + 211266225 = 20282^2 + 14535^2 .

It is a cyclic number.

It is not a de Polignac number, because 622625749 - 2¹⁵ = 622592981 is a prime.

It is a super-2 number, since 2×622625749² = 775325646635622002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622605749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311312874 + 311312875.

It is an arithmetic number, because the mean of its divisors is an integer number (311312875).

Almost surely, 2^622625749 is an apocalyptic number.

It is an amenable number.

622625749 is a deficient number, since it is larger than the sum of its proper divisors (1).

622625749 is an equidigital number, since it uses as much as digits as its factorization.

622625749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 43.

The square root of 622625749 is about 24952.4697975972. The cubic root of 622625749 is about 853.9039562951.

The spelling of 622625749 in words is "six hundred twenty-two million, six hundred twenty-five thousand, seven hundred forty-nine".