393985497 has 8 divisors (see below), whose sum is σ = 525418240. Its totient is φ = 262604880.

The previous prime is 393985483. The next prime is 393985499. The reversal of 393985497 is 794589393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 393985497 - 2⁴ = 393985481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393985499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10872 + ... + 30102.

It is an arithmetic number, because the mean of its divisors is an integer number (65677280).

Almost surely, 2^393985497 is an apocalyptic number.

It is an amenable number.

393985497 is a deficient number, since it is larger than the sum of its proper divisors (131432743).

393985497 is a wasteful number, since it uses less digits than its factorization.

393985497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26063.

The product of its digits is 7348320, while the sum is 57.

The square root of 393985497 is about 19849.0679126250. The cubic root of 393985497 is about 733.0946978127.

The spelling of 393985497 in words is "three hundred ninety-three million, nine hundred eighty-five thousand, four hundred ninety-seven".