393216371 has 8 divisors (see below), whose sum is σ = 396573840. Its totient is φ = 389871712.

The previous prime is 393216361. The next prime is 393216403. The reversal of 393216371 is 173612393.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-393216371 is a prime.

It is a super-2 number, since 2×393216371² = 309238228844819282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393216361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64376 + ... + 70218.

It is an arithmetic number, because the mean of its divisors is an integer number (49571730).

Almost surely, 2^393216371 is an apocalyptic number.

393216371 is a deficient number, since it is larger than the sum of its proper divisors (3357469).

393216371 is a wasteful number, since it uses less digits than its factorization.

393216371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6405.

The product of its digits is 20412, while the sum is 35.

The square root of 393216371 is about 19829.6840872466. The cubic root of 393216371 is about 732.6173456426.

The spelling of 393216371 in words is "three hundred ninety-three million, two hundred sixteen thousand, three hundred seventy-one".