629838989 has 8 divisors (see below), whose sum is σ = 678974520. Its totient is φ = 580801536.

The previous prime is 629838977. The next prime is 629839013. The reversal of 629838989 is 989838926.

It can be written as a sum of positive squares in 4 ways, for example, as 4338889 + 625500100 = 2083^2 + 25010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 629838989 - 2¹² = 629834893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629838919) 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 in 7 ways as a sum of consecutive naturals, for example, 10892 + ... + 37125.

It is an arithmetic number, because the mean of its divisors is an integer number (84871815).

Almost surely, 2^629838989 is an apocalyptic number.

It is an amenable number.

629838989 is a deficient number, since it is larger than the sum of its proper divisors (49135531).

629838989 is a wasteful number, since it uses less digits than its factorization.

629838989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49039.

The product of its digits is 13436928, while the sum is 62.

The square root of 629838989 is about 25096.5931751702. The cubic root of 629838989 is about 857.1888510068.

The spelling of 629838989 in words is "six hundred twenty-nine million, eight hundred thirty-eight thousand, nine hundred eighty-nine".