39973685 has 8 divisors (see below), whose sum is σ = 48090456. Its totient is φ = 31897600.

The previous prime is 39973673. The next prime is 39973691. The reversal of 39973685 is 58637993.

It can be written as a sum of positive squares in 4 ways, for example, as 8814961 + 31158724 = 2969^2 + 5582^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39973685 - 2⁸ = 39973429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7964 + ... + 11973.

It is an arithmetic number, because the mean of its divisors is an integer number (6011307).

Almost surely, 2^39973685 is an apocalyptic number.

It is an amenable number.

39973685 is a deficient number, since it is larger than the sum of its proper divisors (8116771).

39973685 is a wasteful number, since it uses less digits than its factorization.

39973685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20343.

The product of its digits is 1224720, while the sum is 50.

The square root of 39973685 is about 6322.4745946504. The cubic root of 39973685 is about 341.9201761881.

The spelling of 39973685 in words is "thirty-nine million, nine hundred seventy-three thousand, six hundred eighty-five".