918521867 has 2 divisors, whose sum is σ = 918521868. Its totient is φ = 918521866.

The previous prime is 918521833. The next prime is 918521881. The reversal of 918521867 is 768125819.

It is a strong prime.

It is an emirp because it is prime and its reverse (768125819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 918521867 - 2⁶ = 918521803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (918521887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459260933 + 459260934.

It is an arithmetic number, because the mean of its divisors is an integer number (459260934).

Almost surely, 2^918521867 is an apocalyptic number.

918521867 is a deficient number, since it is larger than the sum of its proper divisors (1).

918521867 is an equidigital number, since it uses as much as digits as its factorization.

918521867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 47.

The square root of 918521867 is about 30307.1256802753. The cubic root of 918521867 is about 972.0676717803.

The spelling of 918521867 in words is "nine hundred eighteen million, five hundred twenty-one thousand, eight hundred sixty-seven".