39000221 has 4 divisors (see below), whose sum is σ = 42000252. Its totient is φ = 36000192.

The previous prime is 39000197. The next prime is 39000223. The reversal of 39000221 is 12200093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5707321 + 33292900 = 2389^2 + 5770^2 .

It is a cyclic number.

It is not a de Polignac number, because 39000221 - 2¹⁰ = 38999197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39000223) 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, 1499996 + ... + 1500021.

It is an arithmetic number, because the mean of its divisors is an integer number (10500063).

Almost surely, 2^39000221 is an apocalyptic number.

It is an amenable number.

39000221 is a deficient number, since it is larger than the sum of its proper divisors (3000031).

39000221 is a wasteful number, since it uses less digits than its factorization.

39000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000030.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 39000221 is about 6245.0156925343. The cubic root of 39000221 is about 339.1217848624.

The spelling of 39000221 in words is "thirty-nine million, two hundred twenty-one", and thus it is an aban number.