630629971 has 4 divisors (see below), whose sum is σ = 630896992. Its totient is φ = 630362952.

The previous prime is 630629957. The next prime is 630630019. The reversal of 630629971 is 179926036.

630629971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 630629971 - 2⁹ = 630629459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630629921) 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, 129936 + ... + 134701.

It is an arithmetic number, because the mean of its divisors is an integer number (157724248).

Almost surely, 2^630629971 is an apocalyptic number.

630629971 is a deficient number, since it is larger than the sum of its proper divisors (267021).

630629971 is a wasteful number, since it uses less digits than its factorization.

630629971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267020.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 630629971 is about 25112.3469831077. The cubic root of 630629971 is about 857.5475338507.

The spelling of 630629971 in words is "six hundred thirty million, six hundred twenty-nine thousand, nine hundred seventy-one".