409445873 has 2 divisors, whose sum is σ = 409445874. Its totient is φ = 409445872.

The previous prime is 409445863. The next prime is 409445893. The reversal of 409445873 is 378544904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346592689 + 62853184 = 18617^2 + 7928^2 .

It is a cyclic number.

It is not a de Polignac number, because 409445873 - 2⁴ = 409445857 is a prime.

It is not a weakly prime, because it can be changed into another prime (409445843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204722936 + 204722937.

It is an arithmetic number, because the mean of its divisors is an integer number (204722937).

Almost surely, 2^409445873 is an apocalyptic number.

It is an amenable number.

409445873 is a deficient number, since it is larger than the sum of its proper divisors (1).

409445873 is an equidigital number, since it uses as much as digits as its factorization.

409445873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 409445873 is about 20234.7689139263. The cubic root of 409445873 is about 742.5610514103.

The spelling of 409445873 in words is "four hundred nine million, four hundred forty-five thousand, eight hundred seventy-three".