618774271 has 2 divisors, whose sum is σ = 618774272. Its totient is φ = 618774270.

The previous prime is 618774263. The next prime is 618774283. The reversal of 618774271 is 172477816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618774271 - 2³ = 618774263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618778271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309387135 + 309387136.

It is an arithmetic number, because the mean of its divisors is an integer number (309387136).

Almost surely, 2^618774271 is an apocalyptic number.

618774271 is a deficient number, since it is larger than the sum of its proper divisors (1).

618774271 is an equidigital number, since it uses as much as digits as its factorization.

618774271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712, while the sum is 43.

The square root of 618774271 is about 24875.1737883376. The cubic root of 618774271 is about 852.1396021072.

The spelling of 618774271 in words is "six hundred eighteen million, seven hundred seventy-four thousand, two hundred seventy-one".