39873009 has 12 divisors (see below), whose sum is σ = 58437008. Its totient is φ = 24165240.

The previous prime is 39872983. The next prime is 39873017. The reversal of 39873009 is 90037893.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-39873009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39873019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54559 + ... + 55284.

Almost surely, 2^39873009 is an apocalyptic number.

It is an amenable number.

39873009 is a deficient number, since it is larger than the sum of its proper divisors (18563999).

39873009 is a wasteful number, since it uses less digits than its factorization.

39873009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109868 (or 109857 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 39873009 is about 6314.5078192999. The cubic root of 39873009 is about 341.6328863952.

It can be divided in two parts, 3987 and 3009, that added together give a palindrome (6996).

The spelling of 39873009 in words is "thirty-nine million, eight hundred seventy-three thousand, nine".