918480109 has 2 divisors, whose sum is σ = 918480110. Its totient is φ = 918480108.

The previous prime is 918480077. The next prime is 918480139. The reversal of 918480109 is 901084819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661775625 + 256704484 = 25725^2 + 16022^2 .

It is an emirp because it is prime and its reverse (901084819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 918480109 - 2⁵ = 918480077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918480139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459240054 + 459240055.

It is an arithmetic number, because the mean of its divisors is an integer number (459240055).

Almost surely, 2^918480109 is an apocalyptic number.

It is an amenable number.

918480109 is a deficient number, since it is larger than the sum of its proper divisors (1).

918480109 is an equidigital number, since it uses as much as digits as its factorization.

918480109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 918480109 is about 30306.4367585502. The cubic root of 918480109 is about 972.0529407876.

The spelling of 918480109 in words is "nine hundred eighteen million, four hundred eighty thousand, one hundred nine".