393117919 has 8 divisors (see below), whose sum is σ = 396960768. Its totient is φ = 389294040.

The previous prime is 393117887. The next prime is 393117941. The reversal of 393117919 is 919711393.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 393117919 - 2⁵ = 393117887 is a prime.

It is a super-2 number, since 2×393117919² = 309083396477781122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393117419) by changing a digit.

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, 38824 + ... + 47890.

It is an arithmetic number, because the mean of its divisors is an integer number (49620096).

Almost surely, 2^393117919 is an apocalyptic number.

393117919 is a deficient number, since it is larger than the sum of its proper divisors (3842849).

393117919 is a wasteful number, since it uses less digits than its factorization.

393117919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9485.

The product of its digits is 45927, while the sum is 43.

The square root of 393117919 is about 19827.2014918899. The cubic root of 393117919 is about 732.5561972361.

The spelling of 393117919 in words is "three hundred ninety-three million, one hundred seventeen thousand, nine hundred nineteen".