918400001 has 4 divisors (see below), whose sum is σ = 920823600. Its totient is φ = 915976404.

The previous prime is 918399991. The next prime is 918400031. The reversal of 918400001 is 100004819.

918400001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 918400001 - 2¹⁴ = 918383617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 918400001.

It is not an unprimeable number, because it can be changed into a prime (918400031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211231 + ... + 1211988.

It is an arithmetic number, because the mean of its divisors is an integer number (230205900).

Almost surely, 2^918400001 is an apocalyptic number.

It is an amenable number.

918400001 is a deficient number, since it is larger than the sum of its proper divisors (2423599).

918400001 is a wasteful number, since it uses less digits than its factorization.

918400001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423598.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 918400001 is about 30305.1150963002. The cubic root of 918400001 is about 972.0246797941.

The spelling of 918400001 in words is "nine hundred eighteen million, four hundred thousand, one".