39031993 has 16 divisors (see below), whose sum is σ = 52407936. Its totient is φ = 28074240.

The previous prime is 39031991. The next prime is 39031997. The reversal of 39031993 is 39913093.

39031993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 39031993 - 2¹ = 39031991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39031991) 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 15 ways as a sum of consecutive naturals, for example, 18496 + ... + 20497.

It is an arithmetic number, because the mean of its divisors is an integer number (3275496).

Almost surely, 2^39031993 is an apocalyptic number.

It is an amenable number.

39031993 is a deficient number, since it is larger than the sum of its proper divisors (13375943).

39031993 is a wasteful number, since it uses less digits than its factorization.

39031993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39024.

The product of its (nonzero) digits is 19683, while the sum is 37.

The square root of 39031993 is about 6247.5589633072. The cubic root of 39031993 is about 339.2138497491.

The spelling of 39031993 in words is "thirty-nine million, thirty-one thousand, nine hundred ninety-three".