629309986 has 8 divisors (see below), whose sum is σ = 969477660. Its totient is φ = 306150768.

The previous prime is 629309959. The next prime is 629309987. The reversal of 629309986 is 689903926.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 514155625 + 115154361 = 22675^2 + 10731^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 4252021 + ... + 4252168.

Almost surely, 2^629309986 is an apocalyptic number.

629309986 is a deficient number, since it is larger than the sum of its proper divisors (340167674).

629309986 is a wasteful number, since it uses less digits than its factorization.

629309986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8504228.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 629309986 is about 25086.0516223658. The cubic root of 629309986 is about 856.9487989228.

The spelling of 629309986 in words is "six hundred twenty-nine million, three hundred nine thousand, nine hundred eighty-six".