630290993 has 4 divisors (see below), whose sum is σ = 638269440. Its totient is φ = 622312548.

The previous prime is 630290981. The next prime is 630291001. The reversal of 630290993 is 399092036.

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 630290993 - 2¹⁶ = 630225457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 630290993.

It is not an unprimeable number, because it can be changed into a prime (630290953) 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, 3989105 + ... + 3989262.

It is an arithmetic number, because the mean of its divisors is an integer number (159567360).

Almost surely, 2^630290993 is an apocalyptic number.

It is an amenable number.

630290993 is a deficient number, since it is larger than the sum of its proper divisors (7978447).

630290993 is an equidigital number, since it uses as much as digits as its factorization.

630290993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7978446.

The product of its (nonzero) digits is 78732, while the sum is 41.

The square root of 630290993 is about 25105.5968461218. The cubic root of 630290993 is about 857.3938558562.

The spelling of 630290993 in words is "six hundred thirty million, two hundred ninety thousand, nine hundred ninety-three".