320217449 has 4 divisors (see below), whose sum is σ = 331259460. Its totient is φ = 309175440.

The previous prime is 320217437. The next prime is 320217473. The reversal of 320217449 is 944712023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944712023 = 1733 ⋅545131.

It can be written as a sum of positive squares in 2 ways, for example, as 205406224 + 114811225 = 14332^2 + 10715^2 .

It is a cyclic number.

It is not a de Polignac number, because 320217449 - 2⁴ = 320217433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320211449) 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, 5520962 + ... + 5521019.

It is an arithmetic number, because the mean of its divisors is an integer number (82814865).

Almost surely, 2^320217449 is an apocalyptic number.

It is an amenable number.

320217449 is a deficient number, since it is larger than the sum of its proper divisors (11042011).

320217449 is a wasteful number, since it uses less digits than its factorization.

320217449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11042010.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 320217449 is about 17894.6206721461. The cubic root of 320217449 is about 684.1452738239.

The spelling of 320217449 in words is "three hundred twenty million, two hundred seventeen thousand, four hundred forty-nine".