693993 has 4 divisors (see below), whose sum is σ = 925328. Its totient is φ = 462660.

The previous prime is 693989. The next prime is 694019. The reversal of 693993 is 399396.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 693993 - 2² = 693989 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 693993.

It is not an unprimeable number, because it can be changed into a prime (693943) 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 in 3 ways as a sum of consecutive naturals, for example, 115663 + ... + 115668.

It is an arithmetic number, because the mean of its divisors is an integer number (231332).

2⁶⁹³⁹⁹³ is an apocalyptic number.

It is an amenable number.

693993 is a deficient number, since it is larger than the sum of its proper divisors (231335).

693993 is a wasteful number, since it uses less digits than its factorization.

693993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231334.

The product of its digits is 39366, while the sum is 39.

The square root of 693993 is about 833.0624226311. The cubic root of 693993 is about 88.5356873532.

The spelling of 693993 in words is "six hundred ninety-three thousand, nine hundred ninety-three".