629870389 has 2 divisors, whose sum is σ = 629870390. Its totient is φ = 629870388.

The previous prime is 629870363. The next prime is 629870429. The reversal of 629870389 is 983078926.

629870389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499522500 + 130347889 = 22350^2 + 11417^2 .

It is a cyclic number.

It is not a de Polignac number, because 629870389 - 2⁵ = 629870357 is a prime.

It is a super-2 number, since 2×629870389² = 793473413878022642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629877389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314935194 + 314935195.

It is an arithmetic number, because the mean of its divisors is an integer number (314935195).

Almost surely, 2^629870389 is an apocalyptic number.

It is an amenable number.

629870389 is a deficient number, since it is larger than the sum of its proper divisors (1).

629870389 is an equidigital number, since it uses as much as digits as its factorization.

629870389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 629870389 is about 25097.2187502918. The cubic root of 629870389 is about 857.2030955376.

The spelling of 629870389 in words is "six hundred twenty-nine million, eight hundred seventy thousand, three hundred eighty-nine".