625445617 has 2 divisors, whose sum is σ = 625445618. Its totient is φ = 625445616.

The previous prime is 625445593. The next prime is 625445641. The reversal of 625445617 is 716544526.

It is a happy number.

625445617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (625445593) and next prime (625445641).

It can be written as a sum of positive squares in only one way, i.e., 624950001 + 495616 = 24999^2 + 704^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625445617 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 625445617.

It is not a weakly prime, because it can be changed into another prime (625442617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312722808 + 312722809.

It is an arithmetic number, because the mean of its divisors is an integer number (312722809).

Almost surely, 2^625445617 is an apocalyptic number.

It is an amenable number.

625445617 is a deficient number, since it is larger than the sum of its proper divisors (1).

625445617 is an equidigital number, since it uses as much as digits as its factorization.

625445617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 40.

The square root of 625445617 is about 25008.9107519700. The cubic root of 625445617 is about 855.1911235585.

The spelling of 625445617 in words is "six hundred twenty-five million, four hundred forty-five thousand, six hundred seventeen".