630996861 has 8 divisors (see below), whose sum is σ = 917813664. Its totient is φ = 382422320.

The previous prime is 630996841. The next prime is 630996887. The reversal of 630996861 is 168699036.

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

It is a cyclic number.

It is not a de Polignac number, because 630996861 - 2⁷ = 630996733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 630996861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630996811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9560526 + ... + 9560591.

It is an arithmetic number, because the mean of its divisors is an integer number (114726708).

Almost surely, 2^630996861 is an apocalyptic number.

It is an amenable number.

630996861 is a deficient number, since it is larger than the sum of its proper divisors (286816803).

630996861 is a wasteful number, since it uses less digits than its factorization.

630996861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19121131.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 630996861 is about 25119.6508932748. The cubic root of 630996861 is about 857.7138038950.

The spelling of 630996861 in words is "six hundred thirty million, nine hundred ninety-six thousand, eight hundred sixty-one".