626642041 has 2 divisors, whose sum is σ = 626642042. Its totient is φ = 626642040.

The previous prime is 626641993. The next prime is 626642057. The reversal of 626642041 is 140246626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 457746025 + 168896016 = 21395^2 + 12996^2 .

It is a cyclic number.

It is not a de Polignac number, because 626642041 - 2⁹ = 626641529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 626641994 and 626642012.

It is not a weakly prime, because it can be changed into another prime (626642641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313321020 + 313321021.

It is an arithmetic number, because the mean of its divisors is an integer number (313321021).

Almost surely, 2^626642041 is an apocalyptic number.

It is an amenable number.

626642041 is a deficient number, since it is larger than the sum of its proper divisors (1).

626642041 is an equidigital number, since it uses as much as digits as its factorization.

626642041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 626642041 is about 25032.8192779000. The cubic root of 626642041 is about 855.7360787268.

Adding to 626642041 its reverse (140246626), we get a palindrome (766888667).

The spelling of 626642041 in words is "six hundred twenty-six million, six hundred forty-two thousand, forty-one".