618616387 has 2 divisors, whose sum is σ = 618616388. Its totient is φ = 618616386.

The previous prime is 618616379. The next prime is 618616391. The reversal of 618616387 is 783616816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 618616387 - 2³ = 618616379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (618616337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309308193 + 309308194.

It is an arithmetic number, because the mean of its divisors is an integer number (309308194).

Almost surely, 2^618616387 is an apocalyptic number.

618616387 is a deficient number, since it is larger than the sum of its proper divisors (1).

618616387 is an equidigital number, since it uses as much as digits as its factorization.

618616387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 618616387 is about 24872.0000603088. Note that the first 4 decimals coincide. The cubic root of 618616387 is about 852.0671197499.

The spelling of 618616387 in words is "six hundred eighteen million, six hundred sixteen thousand, three hundred eighty-seven".