918304081 has 2 divisors, whose sum is σ = 918304082. Its totient is φ = 918304080.

The previous prime is 918304063. The next prime is 918304133. The reversal of 918304081 is 180403819.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 893053456 + 25250625 = 29884^2 + 5025^2 .

It is a cyclic number.

It is not a de Polignac number, because 918304081 - 2¹⁵ = 918271313 is a prime.

It is a super-2 number, since 2×918304081² = 1686564770362509122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (918304381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459152040 + 459152041.

It is an arithmetic number, because the mean of its divisors is an integer number (459152041).

Almost surely, 2^918304081 is an apocalyptic number.

It is an amenable number.

918304081 is a deficient number, since it is larger than the sum of its proper divisors (1).

918304081 is an equidigital number, since it uses as much as digits as its factorization.

918304081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 918304081 is about 30303.5324838541. The cubic root of 918304081 is about 971.9908383840.

The spelling of 918304081 in words is "nine hundred eighteen million, three hundred four thousand, eighty-one".