618387643 has 2 divisors, whose sum is σ = 618387644. Its totient is φ = 618387642.

The previous prime is 618387613. The next prime is 618387701. The reversal of 618387643 is 346783816.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618387643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 618387593 and 618387602.

It is not a weakly prime, because it can be changed into another prime (618387613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309193821 + 309193822.

It is an arithmetic number, because the mean of its divisors is an integer number (309193822).

Almost surely, 2^618387643 is an apocalyptic number.

618387643 is a deficient number, since it is larger than the sum of its proper divisors (1).

618387643 is an equidigital number, since it uses as much as digits as its factorization.

618387643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 46.

The square root of 618387643 is about 24867.4012112243. The cubic root of 618387643 is about 851.9620846676.

The spelling of 618387643 in words is "six hundred eighteen million, three hundred eighty-seven thousand, six hundred forty-three".