3992209 has 4 divisors (see below), whose sum is σ = 4299316. Its totient is φ = 3685104.

The previous prime is 3992207. The next prime is 3992213. The reversal of 3992209 is 9022993.

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 305809 + 3686400 = 553^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 3992209 - 2¹ = 3992207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3992201) 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, 153534 + ... + 153559.

It is an arithmetic number, because the mean of its divisors is an integer number (1074829).

Almost surely, 2^3992209 is an apocalyptic number.

It is an amenable number.

3992209 is a deficient number, since it is larger than the sum of its proper divisors (307107).

3992209 is a wasteful number, since it uses less digits than its factorization.

3992209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307106.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 3992209 is about 1998.0513006427. The cubic root of 3992209 is about 158.6369761980.

The spelling of 3992209 in words is "three million, nine hundred ninety-two thousand, two hundred nine".