993478223417 has 4 divisors (see below), whose sum is σ = 1027736093220. Its totient is φ = 959220353616.

The previous prime is 993478223383. The next prime is 993478223459. The reversal of 993478223417 is 714322874399.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 840850486441 + 152627736976 = 916979^2 + 390676^2 .

It is a cyclic number.

It is not a de Polignac number, because 993478223417 - 2⁸ = 993478223161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993478223117) 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, 17128934858 + ... + 17128934915.

It is an arithmetic number, because the mean of its divisors is an integer number (256934023305).

Almost surely, 2^993478223417 is an apocalyptic number.

It is an amenable number.

993478223417 is a deficient number, since it is larger than the sum of its proper divisors (34257869803).

993478223417 is a wasteful number, since it uses less digits than its factorization.

993478223417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34257869802.

The product of its digits is 18289152, while the sum is 59.

The spelling of 993478223417 in words is "nine hundred ninety-three billion, four hundred seventy-eight million, two hundred twenty-three thousand, four hundred seventeen".