993908 has 6 divisors (see below), whose sum is σ = 1739346. Its totient is φ = 496952.

The previous prime is 993907. The next prime is 993913. The reversal of 993908 is 809399.

It can be written as a sum of positive squares in only one way, i.e., 964324 + 29584 = 982^2 + 172^2 .

It is a super-3 number, since 3×993908³ = 2945505333908607936, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam 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 993908.

It is not an unprimeable number, because it can be changed into a prime (993907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124235 + ... + 124242.

It is an arithmetic number, because the mean of its divisors is an integer number (289891).

2⁹⁹³⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

993908 is a deficient number, since it is larger than the sum of its proper divisors (745438).

993908 is a wasteful number, since it uses less digits than its factorization.

993908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248481 (or 248479 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 993908 is about 996.9493467574. The cubic root of 993908 is about 99.7965195713.

The spelling of 993908 in words is "nine hundred ninety-three thousand, nine hundred eight".