39387393 has 12 divisors (see below), whose sum is σ = 57397860. Its totient is φ = 26025216.

The previous prime is 39387389. The next prime is 39387409. The reversal of 39387393 is 39378393.

It can be written as a sum of positive squares in 2 ways, for example, as 1046529 + 38340864 = 1023^2 + 6192^2 .

It is not a de Polignac number, because 39387393 - 2² = 39387389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39387343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18348 + ... + 20381.

It is an arithmetic number, because the mean of its divisors is an integer number (4783155).

Almost surely, 2^39387393 is an apocalyptic number.

It is an amenable number.

39387393 is a deficient number, since it is larger than the sum of its proper divisors (18010467).

39387393 is a wasteful number, since it uses less digits than its factorization.

39387393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38848 (or 38845 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 39387393 is about 6275.9376191928. The cubic root of 39387393 is about 340.2402943769.

The spelling of 39387393 in words is "thirty-nine million, three hundred eighty-seven thousand, three hundred ninety-three".