396067209 has 4 divisors (see below), whose sum is σ = 528089616. Its totient is φ = 264044804.

The previous prime is 396067193. The next prime is 396067213. The reversal of 396067209 is 902760693.

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 396067209 - 2⁴ = 396067193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396067229) 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, 66011199 + ... + 66011204.

It is an arithmetic number, because the mean of its divisors is an integer number (132022404).

Almost surely, 2^396067209 is an apocalyptic number.

It is an amenable number.

396067209 is a deficient number, since it is larger than the sum of its proper divisors (132022407).

396067209 is a wasteful number, since it uses less digits than its factorization.

396067209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132022406.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 396067209 is about 19901.4373601506. The cubic root of 396067209 is about 734.3835879581.

The spelling of 396067209 in words is "three hundred ninety-six million, sixty-seven thousand, two hundred nine".