629681789 has 8 divisors (see below), whose sum is σ = 687284832. Its totient is φ = 572138640.

The previous prime is 629681783. The next prime is 629681821. The reversal of 629681789 is 987186926.

629681789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-629681789 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 (629681783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8642 + ... + 36524.

It is an arithmetic number, because the mean of its divisors is an integer number (85910604).

Almost surely, 2^629681789 is an apocalyptic number.

It is an amenable number.

629681789 is a deficient number, since it is larger than the sum of its proper divisors (57603043).

629681789 is a wasteful number, since it uses less digits than its factorization.

629681789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29947.

The product of its digits is 2612736, while the sum is 56.

The square root of 629681789 is about 25093.4610805285. The cubic root of 629681789 is about 857.1175305043.

The spelling of 629681789 in words is "six hundred twenty-nine million, six hundred eighty-one thousand, seven hundred eighty-nine".