321697 has 4 divisors (see below), whose sum is σ = 332820. Its totient is φ = 310576.

The previous prime is 321679. The next prime is 321707. The reversal of 321697 is 796123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796123 = 71 ⋅11213.

It can be written as a sum of positive squares in 2 ways, for example, as 221841 + 99856 = 471^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 321697 - 2⁷ = 321569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321617) 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, 5518 + ... + 5575.

It is an arithmetic number, because the mean of its divisors is an integer number (83205).

2³²¹⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

321697 is a deficient number, since it is larger than the sum of its proper divisors (11123).

321697 is a wasteful number, since it uses less digits than its factorization.

321697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122.

The product of its digits is 2268, while the sum is 28.

The square root of 321697 is about 567.1833918584. The cubic root of 321697 is about 68.5197343110.

The spelling of 321697 in words is "three hundred twenty-one thousand, six hundred ninety-seven".