320663153 has 4 divisors (see below), whose sum is σ = 325919988. Its totient is φ = 315406320.

The previous prime is 320663117. The next prime is 320663177. The reversal of 320663153 is 351366023.

It is a happy number.

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 34951744 + 285711409 = 5912^2 + 16903^2 .

It is a cyclic number.

It is not a de Polignac number, because 320663153 - 2¹⁶ = 320597617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320665153) 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, 2628326 + ... + 2628447.

It is an arithmetic number, because the mean of its divisors is an integer number (81479997).

Almost surely, 2^320663153 is an apocalyptic number.

It is an amenable number.

320663153 is a deficient number, since it is larger than the sum of its proper divisors (5256835).

320663153 is an equidigital number, since it uses as much as digits as its factorization.

320663153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256834.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 320663153 is about 17907.0699166558. The cubic root of 320663153 is about 684.4625425236.

The spelling of 320663153 in words is "three hundred twenty million, six hundred sixty-three thousand, one hundred fifty-three".