629787109 has 4 divisors (see below), whose sum is σ = 719756704. Its totient is φ = 539817516.

The previous prime is 629787079. The next prime is 629787143. The reversal of 629787109 is 901787926.

It is a happy number.

629787109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 629787109 - 2¹⁷ = 629656037 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 (629787149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44984787 + ... + 44984800.

It is an arithmetic number, because the mean of its divisors is an integer number (179939176).

Almost surely, 2^629787109 is an apocalyptic number.

It is an amenable number.

629787109 is a deficient number, since it is larger than the sum of its proper divisors (89969595).

629787109 is an equidigital number, since it uses as much as digits as its factorization.

629787109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89969594.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 629787109 is about 25095.5595474578. The cubic root of 629787109 is about 857.1653147383.

The spelling of 629787109 in words is "six hundred twenty-nine million, seven hundred eighty-seven thousand, one hundred nine".