408645379 has 4 divisors (see below), whose sum is σ = 421827520. Its totient is φ = 395463240.

The previous prime is 408645359. The next prime is 408645389. The reversal of 408645379 is 973546804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 408645379 - 2²¹ = 406548227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408645359) 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, 6591024 + ... + 6591085.

It is an arithmetic number, because the mean of its divisors is an integer number (105456880).

Almost surely, 2^408645379 is an apocalyptic number.

408645379 is a deficient number, since it is larger than the sum of its proper divisors (13182141).

408645379 is a wasteful number, since it uses less digits than its factorization.

408645379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13182140.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 408645379 is about 20214.9790749335. The cubic root of 408645379 is about 742.0768169031.

The spelling of 408645379 in words is "four hundred eight million, six hundred forty-five thousand, three hundred seventy-nine".