630845569 has 4 divisors (see below), whose sum is σ = 631036080. Its totient is φ = 630655060.

The previous prime is 630845539. The next prime is 630845627. The reversal of 630845569 is 965548036.

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 a de Polignac number, because none of the positive numbers 2^k-630845569 is a prime.

It is a super-2 number, since 2×630845569² = 795932263853867522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630845539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90199 + ... + 96940.

It is an arithmetic number, because the mean of its divisors is an integer number (157759020).

Almost surely, 2^630845569 is an apocalyptic number.

It is an amenable number.

630845569 is a deficient number, since it is larger than the sum of its proper divisors (190511).

630845569 is a wasteful number, since it uses less digits than its factorization.

630845569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190510.

The product of its (nonzero) digits is 777600, while the sum is 46.

The square root of 630845569 is about 25116.6392855414. The cubic root of 630845569 is about 857.6452480287.

The spelling of 630845569 in words is "six hundred thirty million, eight hundred forty-five thousand, five hundred sixty-nine".