629833889 has 2 divisors, whose sum is σ = 629833890. Its totient is φ = 629833888.

The previous prime is 629833871. The next prime is 629833891. The reversal of 629833889 is 988338926.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 564870289 + 64963600 = 23767^2 + 8060^2 .

It is a cyclic number.

It is not a de Polignac number, because 629833889 - 2¹⁶ = 629768353 is a prime.

Together with 629833891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (629835889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314916944 + 314916945.

It is an arithmetic number, because the mean of its divisors is an integer number (314916945).

Almost surely, 2^629833889 is an apocalyptic number.

It is an amenable number.

629833889 is a deficient number, since it is larger than the sum of its proper divisors (1).

629833889 is an equidigital number, since it uses as much as digits as its factorization.

629833889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 56.

The square root of 629833889 is about 25096.4915675478. The cubic root of 629833889 is about 857.1865373600.

The spelling of 629833889 in words is "six hundred twenty-nine million, eight hundred thirty-three thousand, eight hundred eighty-nine".