629309985 has 16 divisors (see below), whose sum is σ = 1010079936. Its totient is φ = 334570688.

The previous prime is 629309959. The next prime is 629309987. The reversal of 629309985 is 589903926.

It is a cyclic number.

It is not a de Polignac number, because 629309985 - 2⁵ = 629309953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (629309987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61419 + ... + 70928.

It is an arithmetic number, because the mean of its divisors is an integer number (63129996).

Almost surely, 2^629309985 is an apocalyptic number.

It is an amenable number.

629309985 is a deficient number, since it is larger than the sum of its proper divisors (380769951).

629309985 is a wasteful number, since it uses less digits than its factorization.

629309985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132672.

The product of its (nonzero) digits is 1049760, while the sum is 51.

The square root of 629309985 is about 25086.0516024344. The cubic root of 629309985 is about 856.9487984689.

The spelling of 629309985 in words is "six hundred twenty-nine million, three hundred nine thousand, nine hundred eighty-five".