409071820273 has 4 divisors (see below), whose sum is σ = 423177745140. Its totient is φ = 394965895408.

The previous prime is 409071820271. The next prime is 409071820279. The reversal of 409071820273 is 372028170904.

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 299896426384 + 109175393889 = 547628^2 + 330417^2 .

It is a cyclic number.

It is not a de Polignac number, because 409071820273 - 2¹ = 409071820271 is a prime.

It is a super-2 number, since 2×409071820273² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409071820271) 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, 7052962390 + ... + 7052962447.

It is an arithmetic number, because the mean of its divisors is an integer number (105794436285).

Almost surely, 2^409071820273 is an apocalyptic number.

It is an amenable number.

409071820273 is a deficient number, since it is larger than the sum of its proper divisors (14105924867).

409071820273 is a wasteful number, since it uses less digits than its factorization.

409071820273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14105924866.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 409071820273 in words is "four hundred nine billion, seventy-one million, eight hundred twenty thousand, two hundred seventy-three".