321606449 has 2 divisors, whose sum is σ = 321606450. Its totient is φ = 321606448.

The previous prime is 321606437. The next prime is 321606569. The reversal of 321606449 is 944606123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305550400 + 16056049 = 17480^2 + 4007^2 .

It is a cyclic number.

It is not a de Polignac number, because 321606449 - 2¹⁶ = 321540913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (321606349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160803224 + 160803225.

It is an arithmetic number, because the mean of its divisors is an integer number (160803225).

Almost surely, 2^321606449 is an apocalyptic number.

It is an amenable number.

321606449 is a deficient number, since it is larger than the sum of its proper divisors (1).

321606449 is an equidigital number, since it uses as much as digits as its factorization.

321606449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 321606449 is about 17933.3892223417. The cubic root of 321606449 is about 685.1330474867.

The spelling of 321606449 in words is "three hundred twenty-one million, six hundred six thousand, four hundred forty-nine".