918421313 has 8 divisors (see below), whose sum is σ = 941898240. Its totient is φ = 895108480.

The previous prime is 918421291. The next prime is 918421319. The reversal of 918421313 is 313124819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 918421313 - 2²⁰ = 917372737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 918421313.

It is not an unprimeable number, because it can be changed into a prime (918421319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29648 + ... + 52113.

It is an arithmetic number, because the mean of its divisors is an integer number (117737280).

Almost surely, 2^918421313 is an apocalyptic number.

It is an amenable number.

918421313 is a deficient number, since it is larger than the sum of its proper divisors (23476927).

918421313 is a wasteful number, since it uses less digits than its factorization.

918421313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82047.

The product of its digits is 5184, while the sum is 32.

The square root of 918421313 is about 30305.4667180692. The cubic root of 918421313 is about 972.0321985331.

The spelling of 918421313 in words is "nine hundred eighteen million, four hundred twenty-one thousand, three hundred thirteen".