918481 has 2 divisors, whose sum is σ = 918482. Its totient is φ = 918480.

The previous prime is 918469. The next prime is 918497. The reversal of 918481 is 184819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547600 + 370881 = 740^2 + 609^2 .

It is a cyclic number.

It is not a de Polignac number, because 918481 - 2⁷ = 918353 is a prime.

It is a super-2 number, since 2×918481² = 1687214694722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (918431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459240 + 459241.

It is an arithmetic number, because the mean of its divisors is an integer number (459241).

2⁹¹⁸⁴⁸¹ is an apocalyptic number.

It is an amenable number.

918481 is a deficient number, since it is larger than the sum of its proper divisors (1).

918481 is an equidigital number, since it uses as much as digits as its factorization.

918481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 31.

The square root of 918481 is about 958.3741440586. The cubic root of 918481 is about 97.2053255111.

The spelling of 918481 in words is "nine hundred eighteen thousand, four hundred eighty-one".