321677 has 4 divisors (see below), whose sum is σ = 323136. Its totient is φ = 320220.

The previous prime is 321661. The next prime is 321679. The reversal of 321677 is 776123.

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: 776123 = 233 ⋅3331.

It is a cyclic number.

It is not a de Polignac number, because 321677 - 2⁴ = 321661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321677.

It is not an unprimeable number, because it can be changed into a prime (321679) 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, 323 + ... + 864.

It is an arithmetic number, because the mean of its divisors is an integer number (80784).

2³²¹⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

321677 is a deficient number, since it is larger than the sum of its proper divisors (1459).

321677 is a wasteful number, since it uses less digits than its factorization.

321677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458.

The product of its digits is 1764, while the sum is 26.

The square root of 321677 is about 567.1657606027. The cubic root of 321677 is about 68.5183143173.

Subtracting from 321677 its product of digits (1764), we obtain a palindrome (319913).

The spelling of 321677 in words is "three hundred twenty-one thousand, six hundred seventy-seven".