630380181 has 4 divisors (see below), whose sum is σ = 840506912. Its totient is φ = 420253452.

The previous prime is 630380173. The next prime is 630380189. The reversal of 630380181 is 181083036.

630380181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (630380173) and next prime (630380189).

It is not a de Polignac number, because 630380181 - 2³ = 630380173 is a prime.

It is a super-2 number, since 2×630380181² = 794758345195185522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630380189) 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, 105063361 + ... + 105063366.

It is an arithmetic number, because the mean of its divisors is an integer number (210126728).

Almost surely, 2^630380181 is an apocalyptic number.

It is an amenable number.

630380181 is a deficient number, since it is larger than the sum of its proper divisors (210126731).

630380181 is a wasteful number, since it uses less digits than its factorization.

630380181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210126730.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 630380181 is about 25107.3730406030. The cubic root of 630380181 is about 857.4342951863.

The spelling of 630380181 in words is "six hundred thirty million, three hundred eighty thousand, one hundred eighty-one".