321643417 has 6 divisors (see below), whose sum is σ = 341676878. Its totient is φ = 302722944.

The previous prime is 321643403. The next prime is 321643429. The reversal of 321643417 is 714346123.

It can be written as a sum of positive squares in 3 ways, for example, as 182898576 + 138744841 = 13524^2 + 11779^2 .

It is not a de Polignac number, because 321643417 - 2¹⁹ = 321119129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321643117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556188 + ... + 556765.

Almost surely, 2^321643417 is an apocalyptic number.

It is an amenable number.

321643417 is a deficient number, since it is larger than the sum of its proper divisors (20033461).

321643417 is a wasteful number, since it uses less digits than its factorization.

321643417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112987 (or 1112970 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 321643417 is about 17934.4198958316. The cubic root of 321643417 is about 685.1592980259.

The spelling of 321643417 in words is "three hundred twenty-one million, six hundred forty-three thousand, four hundred seventeen".