321671697 has 4 divisors (see below), whose sum is σ = 428895600. Its totient is φ = 214447796.

The previous prime is 321671689. The next prime is 321671711. The reversal of 321671697 is 796176123.

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.

It is a cyclic number.

It is not a de Polignac number, because 321671697 - 2³ = 321671689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321671627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53611947 + ... + 53611952.

It is an arithmetic number, because the mean of its divisors is an integer number (107223900).

Almost surely, 2^321671697 is an apocalyptic number.

It is an amenable number.

321671697 is a deficient number, since it is larger than the sum of its proper divisors (107223903).

321671697 is a wasteful number, since it uses less digits than its factorization.

321671697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107223902.

The product of its digits is 95256, while the sum is 42.

The square root of 321671697 is about 17935.2083065684. The cubic root of 321671697 is about 685.1793779613.

The spelling of 321671697 in words is "three hundred twenty-one million, six hundred seventy-one thousand, six hundred ninety-seven".