393319247 has 12 divisors (see below), whose sum is σ = 418328856. Its totient is φ = 369729360.

The previous prime is 393319187. The next prime is 393319249. The reversal of 393319247 is 742913393.

It is not a de Polignac number, because 393319247 - 2¹⁰ = 393318223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393319249) 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 11 ways as a sum of consecutive naturals, for example, 43133 + ... + 51449.

It is an arithmetic number, because the mean of its divisors is an integer number (34860738).

Almost surely, 2^393319247 is an apocalyptic number.

393319247 is a deficient number, since it is larger than the sum of its proper divisors (25009609).

393319247 is a wasteful number, since it uses less digits than its factorization.

393319247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8486 (or 8467 counting only the distinct ones).

The product of its digits is 122472, while the sum is 41.

The square root of 393319247 is about 19832.2779074921. The cubic root of 393319247 is about 732.6812308855.

The spelling of 393319247 in words is "three hundred ninety-three million, three hundred nineteen thousand, two hundred forty-seven".