630966997 has 4 divisors (see below), whose sum is σ = 632983180. Its totient is φ = 628950816.

The previous prime is 630966983. The next prime is 630967039. The reversal of 630966997 is 799669036.

It is a happy number.

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 136749636 + 494217361 = 11694^2 + 22231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630966997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630966937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007622 + ... + 1008247.

It is an arithmetic number, because the mean of its divisors is an integer number (158245795).

Almost surely, 2^630966997 is an apocalyptic number.

It is an amenable number.

630966997 is a deficient number, since it is larger than the sum of its proper divisors (2016183).

630966997 is a wasteful number, since it uses less digits than its factorization.

630966997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016182.

The product of its (nonzero) digits is 3306744, while the sum is 55.

The square root of 630966997 is about 25119.0564512284. The cubic root of 630966997 is about 857.7002723068.

The spelling of 630966997 in words is "six hundred thirty million, nine hundred sixty-six thousand, nine hundred ninety-seven".