630819169 has 4 divisors (see below), whose sum is σ = 633048496. Its totient is φ = 628589844.

The previous prime is 630819139. The next prime is 630819181. The reversal of 630819169 is 961918036.

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 630819169 - 2⁷ = 630819041 is a prime.

It is a super-2 number, since 2×630819169² = 795865647955701122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630819139) 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, 1114239 + ... + 1114804.

It is an arithmetic number, because the mean of its divisors is an integer number (158262124).

Almost surely, 2^630819169 is an apocalyptic number.

It is an amenable number.

630819169 is a deficient number, since it is larger than the sum of its proper divisors (2229327).

630819169 is a wasteful number, since it uses less digits than its factorization.

630819169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229326.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 630819169 is about 25116.1137320247. The cubic root of 630819169 is about 857.6332841126.

The spelling of 630819169 in words is "six hundred thirty million, eight hundred nineteen thousand, one hundred sixty-nine".