321671923 has 2 divisors, whose sum is σ = 321671924. Its totient is φ = 321671922.

The previous prime is 321671921. The next prime is 321671927. The reversal of 321671923 is 329176123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321671923 - 2¹ = 321671921 is a prime.

Together with 321671921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (321671921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160835961 + 160835962.

It is an arithmetic number, because the mean of its divisors is an integer number (160835962).

Almost surely, 2^321671923 is an apocalyptic number.

321671923 is a deficient number, since it is larger than the sum of its proper divisors (1).

321671923 is an equidigital number, since it uses as much as digits as its factorization.

321671923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 321671923 is about 17935.2146070238. The cubic root of 321671923 is about 685.1795384256.

The spelling of 321671923 in words is "three hundred twenty-one million, six hundred seventy-one thousand, nine hundred twenty-three".