320233129 has 4 divisors (see below), whose sum is σ = 321669376. Its totient is φ = 318796884.

The previous prime is 320233091. The next prime is 320233139. The reversal of 320233129 is 921332023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320233129 - 2¹⁹ = 319708841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320233139) 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, 717789 + ... + 718234.

It is an arithmetic number, because the mean of its divisors is an integer number (80417344).

Almost surely, 2^320233129 is an apocalyptic number.

It is an amenable number.

320233129 is a deficient number, since it is larger than the sum of its proper divisors (1436247).

320233129 is a wasteful number, since it uses less digits than its factorization.

320233129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436246.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 320233129 is about 17895.0587872742. The cubic root of 320233129 is about 684.1564404263.

The spelling of 320233129 in words is "three hundred twenty million, two hundred thirty-three thousand, one hundred twenty-nine".