630682993 has 4 divisors (see below), whose sum is σ = 640096240. Its totient is φ = 621269748.

The previous prime is 630682967. The next prime is 630683057. The reversal of 630682993 is 399286036.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 630682993 - 2⁵ = 630682961 is a prime.

It is a super-2 number, since 2×630682993² = 795522075318876098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630682933) 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, 4706523 + ... + 4706656.

It is an arithmetic number, because the mean of its divisors is an integer number (160024060).

Almost surely, 2^630682993 is an apocalyptic number.

It is an amenable number.

630682993 is a deficient number, since it is larger than the sum of its proper divisors (9413247).

630682993 is an equidigital number, since it uses as much as digits as its factorization.

630682993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9413246.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 630682993 is about 25113.4026567488. The cubic root of 630682993 is about 857.5715667559.

The spelling of 630682993 in words is "six hundred thirty million, six hundred eighty-two thousand, nine hundred ninety-three".