629441231 has 2 divisors, whose sum is σ = 629441232. Its totient is φ = 629441230.

The previous prime is 629441213. The next prime is 629441243. The reversal of 629441231 is 132144926.

Together with previous prime (629441213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-629441231 is a prime.

It is a super-2 number, since 2×629441231² = 792392526565590722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629441261) 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, 314720615 + 314720616.

It is an arithmetic number, because the mean of its divisors is an integer number (314720616).

Almost surely, 2^629441231 is an apocalyptic number.

629441231 is a deficient number, since it is larger than the sum of its proper divisors (1).

629441231 is an equidigital number, since it uses as much as digits as its factorization.

629441231 is an odious number, because the sum of its binary digits is odd.

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

The square root of 629441231 is about 25088.6673819077. The cubic root of 629441231 is about 857.0083680963.

The spelling of 629441231 in words is "six hundred twenty-nine million, four hundred forty-one thousand, two hundred thirty-one".