39907 has 4 divisors (see below), whose sum is σ = 45616. Its totient is φ = 34200.

The previous prime is 39901. The next prime is 39929. The reversal of 39907 is 70993.

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 39907 - 2⁷ = 39779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39901) 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, 2844 + ... + 2857.

It is an arithmetic number, because the mean of its divisors is an integer number (11404).

2³⁹⁹⁰⁷ is an apocalyptic number.

39907 is a deficient number, since it is larger than the sum of its proper divisors (5709).

39907 is an equidigital number, since it uses as much as digits as its factorization.

39907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708.

The product of its (nonzero) digits is 1701, while the sum is 28.

The square root of 39907 is about 199.7673647020. The cubic root of 39907 is about 34.1729937387.

It can be divided in two parts, 39 and 907, that added together give a triangular number (946 = T₄₃).

The spelling of 39907 in words is "thirty-nine thousand, nine hundred seven".