354428209 has 4 divisors (see below), whose sum is σ = 355106416. Its totient is φ = 353750004.

The previous prime is 354428201. The next prime is 354428267. The reversal of 354428209 is 902824453.

It is a happy number.

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 354428209 - 2³ = 354428201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (354428201) 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, 338319 + ... + 339364.

It is an arithmetic number, because the mean of its divisors is an integer number (88776604).

Almost surely, 2^354428209 is an apocalyptic number.

It is an amenable number.

354428209 is a deficient number, since it is larger than the sum of its proper divisors (678207).

354428209 is an equidigital number, since it uses as much as digits as its factorization.

354428209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678206.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 354428209 is about 18826.2638088390. The cubic root of 354428209 is about 707.6895130921.

It can be divided in two parts, 35 and 4428209, that added together give a palindrome (4428244).

The spelling of 354428209 in words is "three hundred fifty-four million, four hundred twenty-eight thousand, two hundred nine".