39305939 has 4 divisors (see below), whose sum is σ = 39320424. Its totient is φ = 39291456.

The previous prime is 39305891. The next prime is 39305941. The reversal of 39305939 is 93950393.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39305939 - 2²⁰ = 38257363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39305896 and 39305905.

It is not an unprimeable number, because it can be changed into a prime (39305969) 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, 1817 + ... + 9050.

It is an arithmetic number, because the mean of its divisors is an integer number (9830106).

Almost surely, 2^39305939 is an apocalyptic number.

39305939 is a deficient number, since it is larger than the sum of its proper divisors (14485).

39305939 is a wasteful number, since it uses less digits than its factorization.

39305939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14484.

The product of its (nonzero) digits is 98415, while the sum is 41.

The square root of 39305939 is about 6269.4448717570. Note that the first 3 decimals coincide. The cubic root of 39305939 is about 340.0055910269.

The spelling of 39305939 in words is "thirty-nine million, three hundred five thousand, nine hundred thirty-nine".