39087021 has 8 divisors (see below), whose sum is σ = 52466400. Its totient is φ = 25882832.

The previous prime is 39087017. The next prime is 39087049. The reversal of 39087021 is 12078093.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 39087021 - 2² = 39087017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39087021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39087071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43275 + ... + 44168.

It is an arithmetic number, because the mean of its divisors is an integer number (6558300).

Almost surely, 2^39087021 is an apocalyptic number.

It is an amenable number.

39087021 is a deficient number, since it is larger than the sum of its proper divisors (13379379).

39087021 is a wasteful number, since it uses less digits than its factorization.

39087021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87595.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 39087021 is about 6251.9613722415. The cubic root of 39087021 is about 339.3731848069.

The spelling of 39087021 in words is "thirty-nine million, eighty-seven thousand, twenty-one".