630920929 has 4 divisors (see below), whose sum is σ = 647972884. Its totient is φ = 613868976.

The previous prime is 630920909. The next prime is 630920933. The reversal of 630920929 is 929029036.

630920929 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 can be written as a sum of positive squares in 2 ways, for example, as 282240000 + 348680929 = 16800^2 + 18673^2 .

It is a cyclic number.

It is not a de Polignac number, because 630920929 - 2⁹ = 630920417 is a prime.

It is a super-2 number, since 2×630920929² = 796122437300446082, 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 = 630920891 and 630920900.

It is not an unprimeable number, because it can be changed into a prime (630920909) 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, 8525922 + ... + 8525995.

It is an arithmetic number, because the mean of its divisors is an integer number (161993221).

Almost surely, 2^630920929 is an apocalyptic number.

It is an amenable number.

630920929 is a deficient number, since it is larger than the sum of its proper divisors (17051955).

630920929 is a wasteful number, since it uses less digits than its factorization.

630920929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17051954.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 630920929 is about 25118.1394414475. The cubic root of 630920929 is about 857.6793977349.

The spelling of 630920929 in words is "six hundred thirty million, nine hundred twenty thousand, nine hundred twenty-nine".