393764493 has 8 divisors (see below), whose sum is σ = 552652000. Its totient is φ = 248693328.

The previous prime is 393764461. The next prime is 393764587. The reversal of 393764493 is 394467393.

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

It is not a de Polignac number, because 393764493 - 2⁵ = 393764461 is a prime.

It is the 19844-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393763493) by changing a digit.

It is a nontrivial repunit in base 19843.

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, 3454018 + ... + 3454131.

It is an arithmetic number, because the mean of its divisors is an integer number (69081500).

Almost surely, 2^393764493 is an apocalyptic number.

It is an amenable number.

393764493 is a deficient number, since it is larger than the sum of its proper divisors (158887507).

393764493 is a wasteful number, since it uses less digits than its factorization.

393764493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6908171.

The product of its digits is 1469664, while the sum is 48.

The square root of 393764493 is about 19843.5000188979. The cubic root of 393764493 is about 732.9575970265.

The spelling of 393764493 in words is "three hundred ninety-three million, seven hundred sixty-four thousand, four hundred ninety-three".