39965393 has 16 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 35386176.

The previous prime is 39965381. The next prime is 39965399. The reversal of 39965393 is 39356993.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 39965393 - 2⁴ = 39965377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39965399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85346 + ... + 85812.

It is an arithmetic number, because the mean of its divisors is an integer number (2800980).

Almost surely, 2^39965393 is an apocalyptic number.

It is an amenable number.

39965393 is a deficient number, since it is larger than the sum of its proper divisors (4850287).

39965393 is a wasteful number, since it uses less digits than its factorization.

39965393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its digits is 590490, while the sum is 47.

The square root of 39965393 is about 6321.8188047428. The cubic root of 39965393 is about 341.8965323154.

Subtracting from 39965393 its reverse (39356993), we obtain a square (608400 = 780²).

The spelling of 39965393 in words is "thirty-nine million, nine hundred sixty-five thousand, three hundred ninety-three".