393706417 has 16 divisors (see below), whose sum is σ = 463421952. Its totient is φ = 331004160.

The previous prime is 393706403. The next prime is 393706441. The reversal of 393706417 is 714607393.

It is a cyclic number.

It is not a de Polignac number, because 393706417 - 2¹¹ = 393704369 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 393706417.

It is not an unprimeable number, because it can be changed into a prime (393706457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21883 + ... + 35584.

It is an arithmetic number, because the mean of its divisors is an integer number (28963872).

Almost surely, 2^393706417 is an apocalyptic number.

It is an amenable number.

393706417 is a deficient number, since it is larger than the sum of its proper divisors (69715535).

393706417 is a wasteful number, since it uses less digits than its factorization.

393706417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57528.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 393706417 is about 19842.0366142188. The cubic root of 393706417 is about 732.9215608178.

The spelling of 393706417 in words is "three hundred ninety-three million, seven hundred six thousand, four hundred seventeen".