993905683 has 8 divisors (see below), whose sum is σ = 1002979328. Its totient is φ = 984851784.

The previous prime is 993905623. The next prime is 993905807. The reversal of 993905683 is 386509399.

It is a happy number.

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 993905683 - 2¹⁷ = 993774611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 993905683.

It is not an unprimeable number, because it can be changed into a prime (993905623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107710 + ... + 116572.

It is an arithmetic number, because the mean of its divisors is an integer number (125372416).

Almost surely, 2^993905683 is an apocalyptic number.

993905683 is the 16852-nd centered heptagonal number.

993905683 is a deficient number, since it is larger than the sum of its proper divisors (9073645).

993905683 is a wasteful number, since it uses less digits than its factorization.

993905683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9873.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The square root of 993905683 is about 31526.2697285930. The cubic root of 993905683 is about 997.9644202265.

The spelling of 993905683 in words is "nine hundred ninety-three million, nine hundred five thousand, six hundred eighty-three".