626641061 has 2 divisors, whose sum is σ = 626641062. Its totient is φ = 626641060.

The previous prime is 626641039. The next prime is 626641073. The reversal of 626641061 is 160146626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 433264225 + 193376836 = 20815^2 + 13906^2 .

It is a cyclic number.

It is not a de Polignac number, because 626641061 - 2⁶ = 626640997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626641661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313320530 + 313320531.

It is an arithmetic number, because the mean of its divisors is an integer number (313320531).

Almost surely, 2^626641061 is an apocalyptic number.

It is an amenable number.

626641061 is a deficient number, since it is larger than the sum of its proper divisors (1).

626641061 is an equidigital number, since it uses as much as digits as its factorization.

626641061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 626641061 is about 25032.7997035889. The cubic root of 626641061 is about 855.7356326338.

Adding to 626641061 its reverse (160146626), we get a palindrome (786787687).

The spelling of 626641061 in words is "six hundred twenty-six million, six hundred forty-one thousand, sixty-one".