408379221 has 6 divisors (see below), whose sum is σ = 589881110. Its totient is φ = 272252808.

The previous prime is 408379183. The next prime is 408379277. The reversal of 408379221 is 122973804.

It can be written as a sum of positive squares in only one way, i.e., 402804900 + 5574321 = 20070^2 + 2361^2 .

It is not a de Polignac number, because 408379221 - 2⁶ = 408379157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408375221) 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 5 ways as a sum of consecutive naturals, for example, 22687726 + ... + 22687743.

Almost surely, 2^408379221 is an apocalyptic number.

It is an amenable number.

408379221 is a deficient number, since it is larger than the sum of its proper divisors (181501889).

408379221 is a wasteful number, since it uses less digits than its factorization.

408379221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45375475 (or 45375472 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 408379221 is about 20208.3948150267. The cubic root of 408379221 is about 741.9156726383.

The spelling of 408379221 in words is "four hundred eight million, three hundred seventy-nine thousand, two hundred twenty-one".