918412447 has 4 divisors (see below), whose sum is σ = 939770920. Its totient is φ = 897053976.

The previous prime is 918412441. The next prime is 918412457. The reversal of 918412447 is 744214819.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 918412447 - 2¹⁹ = 917888159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918412441) 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, 10679172 + ... + 10679257.

It is an arithmetic number, because the mean of its divisors is an integer number (234942730).

Almost surely, 2^918412447 is an apocalyptic number.

918412447 is a deficient number, since it is larger than the sum of its proper divisors (21358473).

918412447 is a wasteful number, since it uses less digits than its factorization.

918412447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21358472.

The product of its digits is 64512, while the sum is 40.

The square root of 918412447 is about 30305.3204404771. The cubic root of 918412447 is about 972.0290706785.

The spelling of 918412447 in words is "nine hundred eighteen million, four hundred twelve thousand, four hundred forty-seven".