626641121 has 2 divisors, whose sum is σ = 626641122. Its totient is φ = 626641120.

The previous prime is 626641111. The next prime is 626641129. The reversal of 626641121 is 121146626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 597264721 + 29376400 = 24439^2 + 5420^2 .

It is a cyclic number.

It is not a de Polignac number, because 626641121 - 2¹⁴ = 626624737 is a prime.

It is not a weakly prime, because it can be changed into another prime (626641129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313320560 + 313320561.

It is an arithmetic number, because the mean of its divisors is an integer number (313320561).

Almost surely, 2^626641121 is an apocalyptic number.

It is an amenable number.

626641121 is a deficient number, since it is larger than the sum of its proper divisors (1).

626641121 is an equidigital number, since it uses as much as digits as its factorization.

626641121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 626641121 is about 25032.8009020165. The cubic root of 626641121 is about 855.7356599456.

Adding to 626641121 its reverse (121146626), we get a palindrome (747787747).

The spelling of 626641121 in words is "six hundred twenty-six million, six hundred forty-one thousand, one hundred twenty-one".