320445413 has 4 divisors (see below), whose sum is σ = 321206988. Its totient is φ = 319683840.

The previous prime is 320445347. The next prime is 320445421. The reversal of 320445413 is 314544023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 314544023 = 151 ⋅2083073.

It can be written as a sum of positive squares in 2 ways, for example, as 124389409 + 196056004 = 11153^2 + 14002^2 .

It is a cyclic number.

It is not a de Polignac number, because 320445413 - 2¹⁰ = 320444389 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 (320445113) 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, 380156 + ... + 380997.

It is an arithmetic number, because the mean of its divisors is an integer number (80301747).

Almost surely, 2^320445413 is an apocalyptic number.

It is an amenable number.

320445413 is a deficient number, since it is larger than the sum of its proper divisors (761575).

320445413 is an equidigital number, since it uses as much as digits as its factorization.

320445413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761574.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 320445413 is about 17900.9891626133. The cubic root of 320445413 is about 684.3075838404.

Adding to 320445413 its reverse (314544023), we get a palindrome (634989436).

The spelling of 320445413 in words is "three hundred twenty million, four hundred forty-five thousand, four hundred thirteen".