320029979 has 4 divisors (see below), whose sum is σ = 320417784. Its totient is φ = 319642176.

The previous prime is 320029937. The next prime is 320029991. The reversal of 320029979 is 979920023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979920023 = 4177 ⋅234599.

It is a cyclic number.

It is not a de Polignac number, because 320029979 - 2¹⁶ = 319964443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320029379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192662 + ... + 194315.

It is an arithmetic number, because the mean of its divisors is an integer number (80104446).

Almost surely, 2^320029979 is an apocalyptic number.

320029979 is a deficient number, since it is larger than the sum of its proper divisors (387805).

320029979 is an equidigital number, since it uses as much as digits as its factorization.

320029979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387804.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 320029979 is about 17889.3817388975. The cubic root of 320029979 is about 684.0117377407.

The spelling of 320029979 in words is "three hundred twenty million, twenty-nine thousand, nine hundred seventy-nine".