618660443 has 2 divisors, whose sum is σ = 618660444. Its totient is φ = 618660442.

The previous prime is 618660437. The next prime is 618660499. The reversal of 618660443 is 344066816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618660443 - 2²⁶ = 551551579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 618660397 and 618660406.

It is not a weakly prime, because it can be changed into another prime (618660403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309330221 + 309330222.

It is an arithmetic number, because the mean of its divisors is an integer number (309330222).

Almost surely, 2^618660443 is an apocalyptic number.

618660443 is a deficient number, since it is larger than the sum of its proper divisors (1).

618660443 is an equidigital number, since it uses as much as digits as its factorization.

618660443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 618660443 is about 24872.8856990901. The cubic root of 618660443 is about 852.0873464896.

The spelling of 618660443 in words is "six hundred eighteen million, six hundred sixty thousand, four hundred forty-three".