409072073 has 4 divisors (see below), whose sum is σ = 416790468. Its totient is φ = 401353680.

The previous prime is 409072049. The next prime is 409072093. The reversal of 409072073 is 370270904.

It is a happy number.

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 237252409 + 171819664 = 15403^2 + 13108^2 .

It is a cyclic number.

It is not a de Polignac number, because 409072073 - 2²² = 404877769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409072093) 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, 3859118 + ... + 3859223.

It is an arithmetic number, because the mean of its divisors is an integer number (104197617).

Almost surely, 2^409072073 is an apocalyptic number.

It is an amenable number.

409072073 is a deficient number, since it is larger than the sum of its proper divisors (7718395).

409072073 is an equidigital number, since it uses as much as digits as its factorization.

409072073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7718394.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 409072073 is about 20225.5302279075. The cubic root of 409072073 is about 742.3350110874.

The spelling of 409072073 in words is "four hundred nine million, seventy-two thousand, seventy-three".