321393923 has 2 divisors, whose sum is σ = 321393924. Its totient is φ = 321393922.

The previous prime is 321393913. The next prime is 321393953. The reversal of 321393923 is 329393123.

It is a weak prime.

It is an emirp because it is prime and its reverse (329393123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321393923 - 2⁴ = 321393907 is a prime.

It is not a weakly prime, because it can be changed into another prime (321393913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160696961 + 160696962.

It is an arithmetic number, because the mean of its divisors is an integer number (160696962).

Almost surely, 2^321393923 is an apocalyptic number.

321393923 is a deficient number, since it is larger than the sum of its proper divisors (1).

321393923 is an equidigital number, since it uses as much as digits as its factorization.

321393923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 35.

The square root of 321393923 is about 17927.4628154683. The cubic root of 321393923 is about 684.9820962518.

The spelling of 321393923 in words is "three hundred twenty-one million, three hundred ninety-three thousand, nine hundred twenty-three".