39660393 has 4 divisors (see below), whose sum is σ = 52880528. Its totient is φ = 26440260.

The previous prime is 39660359. The next prime is 39660403. The reversal of 39660393 is 39306693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39660393 - 2¹³ = 39652201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39660323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6610063 + ... + 6610068.

It is an arithmetic number, because the mean of its divisors is an integer number (13220132).

Almost surely, 2^39660393 is an apocalyptic number.

It is an amenable number.

39660393 is a deficient number, since it is larger than the sum of its proper divisors (13220135).

39660393 is a wasteful number, since it uses less digits than its factorization.

39660393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13220134.

The product of its (nonzero) digits is 78732, while the sum is 39.

The square root of 39660393 is about 6297.6497997269. The cubic root of 39660393 is about 341.0245708883.

The spelling of 39660393 in words is "thirty-nine million, six hundred sixty thousand, three hundred ninety-three".