227638643 has 2 divisors, whose sum is σ = 227638644. Its totient is φ = 227638642.

The previous prime is 227638637. The next prime is 227638667. The reversal of 227638643 is 346836722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 227638643 - 2¹⁴ = 227622259 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 227638643.

It is not a weakly prime, because it can be changed into another prime (227635643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113819321 + 113819322.

It is an arithmetic number, because the mean of its divisors is an integer number (113819322).

Almost surely, 2^227638643 is an apocalyptic number.

227638643 is a deficient number, since it is larger than the sum of its proper divisors (1).

227638643 is an equidigital number, since it uses as much as digits as its factorization.

227638643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 41.

The square root of 227638643 is about 15087.6983996897. The cubic root of 227638643 is about 610.5885594196.

The spelling of 227638643 in words is "two hundred twenty-seven million, six hundred thirty-eight thousand, six hundred forty-three".