918900001 has 2 divisors, whose sum is σ = 918900002. Its totient is φ = 918900000.

The previous prime is 918899987. The next prime is 918900007. The reversal of 918900001 is 100009819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464187025 + 454712976 = 21545^2 + 21324^2 .

It is a cyclic number.

It is not a de Polignac number, because 918900001 - 2¹¹ = 918897953 is a prime.

It is not a weakly prime, because it can be changed into another prime (918900007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459450000 + 459450001.

It is an arithmetic number, because the mean of its divisors is an integer number (459450001).

Almost surely, 2^918900001 is an apocalyptic number.

It is an amenable number.

918900001 is a deficient number, since it is larger than the sum of its proper divisors (1).

918900001 is an equidigital number, since it uses as much as digits as its factorization.

918900001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 918900001 is about 30313.3634062603. The cubic root of 918900001 is about 972.2010459987.

The spelling of 918900001 in words is "nine hundred eighteen million, nine hundred thousand, one".