993917 has 4 divisors (see below), whose sum is σ = 1028220. Its totient is φ = 959616.

The previous prime is 993913. The next prime is 993919. The reversal of 993917 is 719399.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 719399 = 599 ⋅1201.

It can be written as a sum of positive squares in 2 ways, for example, as 737881 + 256036 = 859^2 + 506^2 .

It is a cyclic number.

It is not a de Polignac number, because 993917 - 2² = 993913 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 993917.

It is not an unprimeable number, because it can be changed into a prime (993913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17108 + ... + 17165.

It is an arithmetic number, because the mean of its divisors is an integer number (257055).

2⁹⁹³⁹¹⁷ is an apocalyptic number.

It is an amenable number.

993917 is a deficient number, since it is larger than the sum of its proper divisors (34303).

993917 is a wasteful number, since it uses less digits than its factorization.

993917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34302.

The product of its digits is 15309, while the sum is 38.

The square root of 993917 is about 996.9538605171. The cubic root of 993917 is about 99.7968207950.

It can be divided in two parts, 99 and 3917, that multiplied together give a palindrome (387783).

The spelling of 993917 in words is "nine hundred ninety-three thousand, nine hundred seventeen".