629385983221 has 2 divisors, whose sum is σ = 629385983222. Its totient is φ = 629385983220.

The previous prime is 629385983207. The next prime is 629385983257. The reversal of 629385983221 is 122389583926.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445442782225 + 183943200996 = 667415^2 + 428886^2 .

It is a cyclic number.

It is not a de Polignac number, because 629385983221 - 2¹¹ = 629385981173 is a prime.

It is a super-2 number, since 2×629385983221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629385984221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314692991610 + 314692991611.

It is an arithmetic number, because the mean of its divisors is an integer number (314692991611).

Almost surely, 2^629385983221 is an apocalyptic number.

It is an amenable number.

629385983221 is a deficient number, since it is larger than the sum of its proper divisors (1).

629385983221 is an equidigital number, since it uses as much as digits as its factorization.

629385983221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11197440, while the sum is 58.

The spelling of 629385983221 in words is "six hundred twenty-nine billion, three hundred eighty-five million, nine hundred eighty-three thousand, two hundred twenty-one".