918612647 has 2 divisors, whose sum is σ = 918612648. Its totient is φ = 918612646.

The previous prime is 918612599. The next prime is 918612649. The reversal of 918612647 is 746216819.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 918612647 - 2²⁸ = 650177191 is a prime.

Together with 918612649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 918612598 and 918612607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918612649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459306323 + 459306324.

It is an arithmetic number, because the mean of its divisors is an integer number (459306324).

Almost surely, 2^918612647 is an apocalyptic number.

918612647 is a deficient number, since it is larger than the sum of its proper divisors (1).

918612647 is an equidigital number, since it uses as much as digits as its factorization.

918612647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 918612647 is about 30308.6233108665. The cubic root of 918612647 is about 972.0996947510.

The spelling of 918612647 in words is "nine hundred eighteen million, six hundred twelve thousand, six hundred forty-seven".