39687241 has 4 divisors (see below), whose sum is σ = 43295184. Its totient is φ = 36079300.

The previous prime is 39687229. The next prime is 39687247. The reversal of 39687241 is 14278693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39687241 - 2¹⁹ = 39162953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39687194 and 39687203.

It is not an unprimeable number, because it can be changed into a prime (39687247) 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, 1803955 + ... + 1803976.

It is an arithmetic number, because the mean of its divisors is an integer number (10823796).

Almost surely, 2^39687241 is an apocalyptic number.

It is an amenable number.

39687241 is a deficient number, since it is larger than the sum of its proper divisors (3607943).

39687241 is a wasteful number, since it uses less digits than its factorization.

39687241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607942.

The product of its digits is 72576, while the sum is 40.

The square root of 39687241 is about 6299.7810279406. The cubic root of 39687241 is about 341.1015054297.

The spelling of 39687241 in words is "thirty-nine million, six hundred eighty-seven thousand, two hundred forty-one".