629968865 has 8 divisors (see below), whose sum is σ = 770226408. Its totient is φ = 494465920.

The previous prime is 629968853. The next prime is 629968957. The reversal of 629968865 is 568869926.

629968865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 42003361 + 587965504 = 6481^2 + 24248^2 .

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

It is not a de Polignac number, because 629968865 - 2⁴ = 629968849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1188356 + ... + 1188885.

It is an arithmetic number, because the mean of its divisors is an integer number (96278301).

Almost surely, 2^629968865 is an apocalyptic number.

It is an amenable number.

629968865 is a deficient number, since it is larger than the sum of its proper divisors (140257543).

629968865 is a wasteful number, since it uses less digits than its factorization.

629968865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377299.

The product of its digits is 11197440, while the sum is 59.

The square root of 629968865 is about 25099.1805643133. The cubic root of 629968865 is about 857.2477658564.

The spelling of 629968865 in words is "six hundred twenty-nine million, nine hundred sixty-eight thousand, eight hundred sixty-five".