320405310409 has 2 divisors, whose sum is σ = 320405310410. Its totient is φ = 320405310408.

The previous prime is 320405310373. The next prime is 320405310493. The reversal of 320405310409 is 904013504023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319321057225 + 1084253184 = 565085^2 + 32928^2 .

It is a cyclic number.

It is not a de Polignac number, because 320405310409 - 2²⁹ = 319868439497 is a prime.

It is not a weakly prime, because it can be changed into another prime (320405310109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160202655204 + 160202655205.

It is an arithmetic number, because the mean of its divisors is an integer number (160202655205).

Almost surely, 2^320405310409 is an apocalyptic number.

It is an amenable number.

320405310409 is a deficient number, since it is larger than the sum of its proper divisors (1).

320405310409 is an equidigital number, since it uses as much as digits as its factorization.

320405310409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 320405310409 in words is "three hundred twenty billion, four hundred five million, three hundred ten thousand, four hundred nine".