918476981 has 2 divisors, whose sum is σ = 918476982. Its totient is φ = 918476980.

The previous prime is 918476971. The next prime is 918477017. The reversal of 918476981 is 189674819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535922500 + 382554481 = 23150^2 + 19559^2 .

It is a cyclic number.

It is not a de Polignac number, because 918476981 - 2¹⁸ = 918214837 is a prime.

It is a super-2 number, since 2×918476981² = 1687199929253748722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918476941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459238490 + 459238491.

It is an arithmetic number, because the mean of its divisors is an integer number (459238491).

Almost surely, 2^918476981 is an apocalyptic number.

It is an amenable number.

918476981 is a deficient number, since it is larger than the sum of its proper divisors (1).

918476981 is an equidigital number, since it uses as much as digits as its factorization.

918476981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 53.

The square root of 918476981 is about 30306.3851523074. The cubic root of 918476981 is about 972.0518373033.

The spelling of 918476981 in words is "nine hundred eighteen million, four hundred seventy-six thousand, nine hundred eighty-one".