409320493 has 4 divisors (see below), whose sum is σ = 411398460. Its totient is φ = 407242528.

The previous prime is 409320491. The next prime is 409320521. The reversal of 409320493 is 394023904.

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 274830084 + 134490409 = 16578^2 + 11597^2 .

It is a cyclic number.

It is not a de Polignac number, because 409320493 - 2¹ = 409320491 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 (409320491) 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, 1038688 + ... + 1039081.

It is an arithmetic number, because the mean of its divisors is an integer number (102849615).

Almost surely, 2^409320493 is an apocalyptic number.

It is an amenable number.

409320493 is a deficient number, since it is larger than the sum of its proper divisors (2077967).

409320493 is a wasteful number, since it uses less digits than its factorization.

409320493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077966.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 409320493 is about 20231.6705439763. The cubic root of 409320493 is about 742.4852483021.

The spelling of 409320493 in words is "four hundred nine million, three hundred twenty thousand, four hundred ninety-three".