618908471 has 2 divisors, whose sum is σ = 618908472. Its totient is φ = 618908470.

The previous prime is 618908447. The next prime is 618908473. The reversal of 618908471 is 174809816.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618908471 is a prime.

It is a super-3 number, since 3×618908471³ (a number of 27 digits) contains 333 as substring.

Together with 618908473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618908473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309454235 + 309454236.

It is an arithmetic number, because the mean of its divisors is an integer number (309454236).

Almost surely, 2^618908471 is an apocalyptic number.

618908471 is a deficient number, since it is larger than the sum of its proper divisors (1).

618908471 is an equidigital number, since it uses as much as digits as its factorization.

618908471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 618908471 is about 24877.8711106879. The cubic root of 618908471 is about 852.2012017748.

The spelling of 618908471 in words is "six hundred eighteen million, nine hundred eight thousand, four hundred seventy-one".