320777 has 4 divisors (see below), whose sum is σ = 337680. Its totient is φ = 303876.

The previous prime is 320767. The next prime is 320791. The reversal of 320777 is 777023.

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, and also an emirpimes, since its reverse is a distinct semiprime: 777023 = 13 ⋅59771.

It is a cyclic number.

It is not a de Polignac number, because 320777 - 2⁶ = 320713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320767) 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, 8423 + ... + 8460.

It is an arithmetic number, because the mean of its divisors is an integer number (84420).

2³²⁰⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

320777 is a deficient number, since it is larger than the sum of its proper divisors (16903).

320777 is a wasteful number, since it uses less digits than its factorization.

320777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16902.

The product of its (nonzero) digits is 2058, while the sum is 26.

The square root of 320777 is about 566.3717860205. The cubic root of 320777 is about 68.4543535913.

The spelling of 320777 in words is "three hundred twenty thousand, seven hundred seventy-seven", and thus it is an iban number.