321920040929 has 2 divisors, whose sum is σ = 321920040930. Its totient is φ = 321920040928.

The previous prime is 321920040907. The next prime is 321920040971. The reversal of 321920040929 is 929040029123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168313267600 + 153606773329 = 410260^2 + 391927^2 .

It is a cyclic number.

It is not a de Polignac number, because 321920040929 - 2¹⁶ = 321919975393 is a prime.

It is not a weakly prime, because it can be changed into another prime (321920040229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160960020464 + 160960020465.

It is an arithmetic number, because the mean of its divisors is an integer number (160960020465).

Almost surely, 2^321920040929 is an apocalyptic number.

It is an amenable number.

321920040929 is a deficient number, since it is larger than the sum of its proper divisors (1).

321920040929 is an equidigital number, since it uses as much as digits as its factorization.

321920040929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 321920040929 in words is "three hundred twenty-one billion, nine hundred twenty million, forty thousand, nine hundred twenty-nine".