405318109 has 4 divisors (see below), whose sum is σ = 463220704. Its totient is φ = 347415516.

The previous prime is 405318107. The next prime is 405318163. The reversal of 405318109 is 901813504.

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 not a de Polignac number, because 405318109 - 2¹ = 405318107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405318101) 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, 28951287 + ... + 28951300.

It is an arithmetic number, because the mean of its divisors is an integer number (115805176).

Almost surely, 2^405318109 is an apocalyptic number.

It is an amenable number.

405318109 is a deficient number, since it is larger than the sum of its proper divisors (57902595).

405318109 is an equidigital number, since it uses as much as digits as its factorization.

405318109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57902594.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 405318109 is about 20132.5137277986. The cubic root of 405318109 is about 740.0572812976.

The spelling of 405318109 in words is "four hundred five million, three hundred eighteen thousand, one hundred nine".