409222945 has 4 divisors (see below), whose sum is σ = 491067540. Its totient is φ = 327378352.

The previous prime is 409222897. The next prime is 409222949. The reversal of 409222945 is 549222904.

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 51710481 + 357512464 = 7191^2 + 18908^2 .

It is a cyclic number.

It is not a de Polignac number, because 409222945 - 2¹⁹ = 408698657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (409222949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40922290 + ... + 40922299.

It is an arithmetic number, because the mean of its divisors is an integer number (122766885).

Almost surely, 2^409222945 is an apocalyptic number.

It is an amenable number.

409222945 is a deficient number, since it is larger than the sum of its proper divisors (81844595).

409222945 is an equidigital number, since it uses as much as digits as its factorization.

409222945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81844594.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 409222945 is about 20229.2596256017. The cubic root of 409222945 is about 742.4262613497.

The spelling of 409222945 in words is "four hundred nine million, two hundred twenty-two thousand, nine hundred forty-five".