630270253 has 4 divisors (see below), whose sum is σ = 652003740. Its totient is φ = 608536768.

The previous prime is 630270241. The next prime is 630270271. The reversal of 630270253 is 352072036.

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

It can be written as a sum of positive squares in 2 ways, for example, as 487658889 + 142611364 = 22083^2 + 11942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630270253 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 (630270233) 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, 10866700 + ... + 10866757.

It is an arithmetic number, because the mean of its divisors is an integer number (163000935).

Almost surely, 2^630270253 is an apocalyptic number.

It is an amenable number.

630270253 is a deficient number, since it is larger than the sum of its proper divisors (21733487).

630270253 is a wasteful number, since it uses less digits than its factorization.

630270253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21733486.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 630270253 is about 25105.1837874173. The cubic root of 630270253 is about 857.3844514468.

The spelling of 630270253 in words is "six hundred thirty million, two hundred seventy thousand, two hundred fifty-three".