618621343 has 2 divisors, whose sum is σ = 618621344. Its totient is φ = 618621342.

The previous prime is 618621319. The next prime is 618621371. The reversal of 618621343 is 343126816.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618621343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 618621299 and 618621308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618621373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309310671 + 309310672.

It is an arithmetic number, because the mean of its divisors is an integer number (309310672).

Almost surely, 2^618621343 is an apocalyptic number.

618621343 is a deficient number, since it is larger than the sum of its proper divisors (1).

618621343 is an equidigital number, since it uses as much as digits as its factorization.

618621343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 618621343 is about 24872.0996902151. The cubic root of 618621343 is about 852.0693951683.

The spelling of 618621343 in words is "six hundred eighteen million, six hundred twenty-one thousand, three hundred forty-three".