630185641 has 2 divisors, whose sum is σ = 630185642. Its totient is φ = 630185640.

The previous prime is 630185629. The next prime is 630185651. The reversal of 630185641 is 146581036.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 590684416 + 39501225 = 24304^2 + 6285^2 .

It is a cyclic number.

It is not a de Polignac number, because 630185641 - 2⁷ = 630185513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 630185597 and 630185606.

It is not a weakly prime, because it can be changed into another prime (630185651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315092820 + 315092821.

It is an arithmetic number, because the mean of its divisors is an integer number (315092821).

Almost surely, 2^630185641 is an apocalyptic number.

It is an amenable number.

630185641 is a deficient number, since it is larger than the sum of its proper divisors (1).

630185641 is an equidigital number, since it uses as much as digits as its factorization.

630185641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 630185641 is about 25103.4985808751. The cubic root of 630185641 is about 857.3460825833.

The spelling of 630185641 in words is "six hundred thirty million, one hundred eighty-five thousand, six hundred forty-one".