393404693 has 4 divisors (see below), whose sum is σ = 429168768. Its totient is φ = 357640620.

The previous prime is 393404651. The next prime is 393404707. The reversal of 393404693 is 396404393.

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 a cyclic number.

It is not a de Polignac number, because 393404693 - 2¹⁰ = 393403669 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 393404693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393404603) 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, 17882021 + ... + 17882042.

It is an arithmetic number, because the mean of its divisors is an integer number (107292192).

Almost surely, 2^393404693 is an apocalyptic number.

It is an amenable number.

393404693 is a deficient number, since it is larger than the sum of its proper divisors (35764075).

393404693 is a wasteful number, since it uses less digits than its factorization.

393404693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35764074.

The product of its (nonzero) digits is 209952, while the sum is 41.

The square root of 393404693 is about 19834.4320059839. The cubic root of 393404693 is about 732.7342837580.

The spelling of 393404693 in words is "three hundred ninety-three million, four hundred four thousand, six hundred ninety-three".