409949005 has 4 divisors (see below), whose sum is σ = 491938812. Its totient is φ = 327959200.

The previous prime is 409948969. The next prime is 409949009. The reversal of 409949005 is 500949904.

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 103103716 + 306845289 = 10154^2 + 17517^2 .

It is a de Polignac number, because none of the positive numbers 2^k-409949005 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 (409949009) 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, 40994896 + ... + 40994905.

It is an arithmetic number, because the mean of its divisors is an integer number (122984703).

Almost surely, 2^409949005 is an apocalyptic number.

It is an amenable number.

409949005 is a deficient number, since it is larger than the sum of its proper divisors (81989807).

409949005 is an equidigital number, since it uses as much as digits as its factorization.

409949005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81989806.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 409949005 is about 20247.1974603894. The cubic root of 409949005 is about 742.8650828874.

The spelling of 409949005 in words is "four hundred nine million, nine hundred forty-nine thousand, five".