630120031 has 4 divisors (see below), whose sum is σ = 631875600. Its totient is φ = 628364464.

The previous prime is 630119989. The next prime is 630120097. The reversal of 630120031 is 130021036.

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 630120031 - 2⁹ = 630119519 is a prime.

It is a super-2 number, since 2×630120031² = 794102506934881922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 630119987 and 630120014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630120331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 877246 + ... + 877963.

It is an arithmetic number, because the mean of its divisors is an integer number (157968900).

Almost surely, 2^630120031 is an apocalyptic number.

630120031 is a deficient number, since it is larger than the sum of its proper divisors (1755569).

630120031 is a wasteful number, since it uses less digits than its factorization.

630120031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755568.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 630120031 is about 25102.1917568964. The cubic root of 630120031 is about 857.3163281612.

Adding to 630120031 its reverse (130021036), we get a palindrome (760141067).

The spelling of 630120031 in words is "six hundred thirty million, one hundred twenty thousand, thirty-one".