629909855 has 16 divisors (see below), whose sum is σ = 808000704. Its totient is φ = 470257920.

The previous prime is 629909843. The next prime is 629909873. The reversal of 629909855 is 558909926.

It is a happy number.

It is not a de Polignac number, because 629909855 - 2²⁶ = 562800991 is a prime.

It is a super-2 number, since 2×629909855² = 793572850852242050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 629909797 and 629909806.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 62084 + ... + 71513.

It is an arithmetic number, because the mean of its divisors is an integer number (50500044).

Almost surely, 2^629909855 is an apocalyptic number.

629909855 is a deficient number, since it is larger than the sum of its proper divisors (178090849).

629909855 is a wasteful number, since it uses less digits than its factorization.

629909855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133666.

The product of its (nonzero) digits is 1749600, while the sum is 53.

The square root of 629909855 is about 25098.0050003979. The cubic root of 629909855 is about 857.2209985176.

The spelling of 629909855 in words is "six hundred twenty-nine million, nine hundred nine thousand, eight hundred fifty-five".