320777873 has 4 divisors (see below), whose sum is σ = 345453108. Its totient is φ = 296102640.

The previous prime is 320777861. The next prime is 320777909. The reversal of 320777873 is 378777023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 378777023 = 431 ⋅878833.

It can be written as a sum of positive squares in 2 ways, for example, as 143808064 + 176969809 = 11992^2 + 13303^2 .

It is a cyclic number.

It is not a de Polignac number, because 320777873 - 2¹⁰ = 320776849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320777813) 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, 12337598 + ... + 12337623.

It is an arithmetic number, because the mean of its divisors is an integer number (86363277).

Almost surely, 2^320777873 is an apocalyptic number.

It is an amenable number.

320777873 is a deficient number, since it is larger than the sum of its proper divisors (24675235).

320777873 is a wasteful number, since it uses less digits than its factorization.

320777873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24675234.

The product of its (nonzero) digits is 345744, while the sum is 44.

The square root of 320777873 is about 17910.2728343261. The cubic root of 320777873 is about 684.5441569114.

The spelling of 320777873 in words is "three hundred twenty million, seven hundred seventy-seven thousand, eight hundred seventy-three".