629968855 has 4 divisors (see below), whose sum is σ = 755962632. Its totient is φ = 503975080.

The previous prime is 629968853. The next prime is 629968957. The reversal of 629968855 is 558869926.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 629968855 - 2¹ = 629968853 is a prime.

It is a super-2 number, since 2×629968855² = 793721516540022050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 629968855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629968853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62996881 + ... + 62996890.

It is an arithmetic number, because the mean of its divisors is an integer number (188990658).

Almost surely, 2^629968855 is an apocalyptic number.

629968855 is a deficient number, since it is larger than the sum of its proper divisors (125993777).

629968855 is a wasteful number, since it uses less digits than its factorization.

629968855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125993776.

The product of its digits is 9331200, while the sum is 58.

The square root of 629968855 is about 25099.1803651036. The cubic root of 629968855 is about 857.2477613205.

The spelling of 629968855 in words is "six hundred twenty-nine million, nine hundred sixty-eight thousand, eight hundred fifty-five".