629441261 has 2 divisors, whose sum is σ = 629441262. Its totient is φ = 629441260.

The previous prime is 629441243. The next prime is 629441311. The reversal of 629441261 is 162144926.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625300036 + 4141225 = 25006^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 629441261 - 2²² = 625246957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629441231) 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, 314720630 + 314720631.

It is an arithmetic number, because the mean of its divisors is an integer number (314720631).

Almost surely, 2^629441261 is an apocalyptic number.

It is an amenable number.

629441261 is a deficient number, since it is larger than the sum of its proper divisors (1).

629441261 is an equidigital number, since it uses as much as digits as its factorization.

629441261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 629441261 is about 25088.6679797872. The cubic root of 629441261 is about 857.0083817117.

The spelling of 629441261 in words is "six hundred twenty-nine million, four hundred forty-one thousand, two hundred sixty-one".