630516823 has 4 divisors (see below), whose sum is σ = 631953520. Its totient is φ = 629080128.

The previous prime is 630516787. The next prime is 630516839. The reversal of 630516823 is 328615036.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 630516823 - 2¹⁷ = 630385751 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 (630516883) 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, 717690 + ... + 718567.

It is an arithmetic number, because the mean of its divisors is an integer number (157988380).

Almost surely, 2^630516823 is an apocalyptic number.

630516823 is a deficient number, since it is larger than the sum of its proper divisors (1436697).

630516823 is a wasteful number, since it uses less digits than its factorization.

630516823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436696.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 630516823 is about 25110.0940460206. The cubic root of 630516823 is about 857.4962435555.

The spelling of 630516823 in words is "six hundred thirty million, five hundred sixteen thousand, eight hundred twenty-three".