409449397 has 16 divisors (see below), whose sum is σ = 482639872. Its totient is φ = 340063920.

The previous prime is 409449389. The next prime is 409449401. The reversal of 409449397 is 793944904.

It is not a de Polignac number, because 409449397 - 2³ = 409449389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 409449397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409449367) 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 15 ways as a sum of consecutive naturals, for example, 32872 + ... + 43582.

It is an arithmetic number, because the mean of its divisors is an integer number (30164992).

Almost surely, 2^409449397 is an apocalyptic number.

It is an amenable number.

409449397 is a deficient number, since it is larger than the sum of its proper divisors (73190475).

409449397 is a wasteful number, since it uses less digits than its factorization.

409449397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10888.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 409449397 is about 20234.8559915805. The cubic root of 409449397 is about 742.5631817510.

The spelling of 409449397 in words is "four hundred nine million, four hundred forty-nine thousand, three hundred ninety-seven".