918397 has 2 divisors, whose sum is σ = 918398. Its totient is φ = 918396.

The previous prime is 918389. The next prime is 918431. The reversal of 918397 is 793819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 910116 + 8281 = 954^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 918397 - 2³ = 918389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459198 + 459199.

It is an arithmetic number, because the mean of its divisors is an integer number (459199).

2⁹¹⁸³⁹⁷ is an apocalyptic number.

It is an amenable number.

918397 is a deficient number, since it is larger than the sum of its proper divisors (1).

918397 is an equidigital number, since it uses as much as digits as its factorization.

918397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 918397 is about 958.3303188358. The cubic root of 918397 is about 97.2023621051.

The spelling of 918397 in words is "nine hundred eighteen thousand, three hundred ninety-seven".