401108209 has 4 divisors (see below), whose sum is σ = 406602916. Its totient is φ = 395613504.

The previous prime is 401108173. The next prime is 401108219. The reversal of 401108209 is 902801104.

It is a happy number.

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 234181809 + 166926400 = 15303^2 + 12920^2 .

It is a cyclic number.

It is not a de Polignac number, because 401108209 - 2⁹ = 401107697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401108219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2747244 + ... + 2747389.

It is an arithmetic number, because the mean of its divisors is an integer number (101650729).

Almost surely, 2^401108209 is an apocalyptic number.

It is an amenable number.

401108209 is a deficient number, since it is larger than the sum of its proper divisors (5494707).

401108209 is an equidigital number, since it uses as much as digits as its factorization.

401108209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5494706.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 401108209 is about 20027.6860620492. The cubic root of 401108209 is about 737.4861184402.

The spelling of 401108209 in words is "four hundred one million, one hundred eight thousand, two hundred nine".