625071641 has 2 divisors, whose sum is σ = 625071642. Its totient is φ = 625071640.

The previous prime is 625071619. The next prime is 625071647. The reversal of 625071641 is 146170526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 610287616 + 14784025 = 24704^2 + 3845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625071641 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 625071598 and 625071607.

It is not a weakly prime, because it can be changed into another prime (625071647) 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, 312535820 + 312535821.

It is an arithmetic number, because the mean of its divisors is an integer number (312535821).

Almost surely, 2^625071641 is an apocalyptic number.

It is an amenable number.

625071641 is a deficient number, since it is larger than the sum of its proper divisors (1).

625071641 is an equidigital number, since it uses as much as digits as its factorization.

625071641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 625071641 is about 25001.4327789429. The cubic root of 625071641 is about 855.0206399267.

The spelling of 625071641 in words is "six hundred twenty-five million, seventy-one thousand, six hundred forty-one".