630646431 has 8 divisors (see below), whose sum is σ = 842236080. Its totient is φ = 419743872.

The previous prime is 630646427. The next prime is 630646439. The reversal of 630646431 is 134646036.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 630646431 - 2² = 630646427 is a prime.

It is a super-2 number, since 2×630646431² = 795429841866075522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 630646392 and 630646401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630646439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169626 + ... + 173303.

It is an arithmetic number, because the mean of its divisors is an integer number (105279510).

Almost surely, 2^630646431 is an apocalyptic number.

630646431 is a deficient number, since it is larger than the sum of its proper divisors (211589649).

630646431 is a wasteful number, since it uses less digits than its factorization.

630646431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343545.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 630646431 is about 25112.6747082026. The cubic root of 630646431 is about 857.5549947021.

It can be divided in two parts, 630 and 646431, that multiplied together give a triangular number (407251530 = T₂₈₅₃₉).

The spelling of 630646431 in words is "six hundred thirty million, six hundred forty-six thousand, four hundred thirty-one".