321929423 has 4 divisors (see below), whose sum is σ = 321983160. Its totient is φ = 321875688.

The previous prime is 321929411. The next prime is 321929431. The reversal of 321929423 is 324929123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321929423 - 2¹² = 321925327 is a prime.

It is a super-2 number, since 2×321929423² = 207277106786225858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321929623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16565 + ... + 30302.

It is an arithmetic number, because the mean of its divisors is an integer number (80495790).

Almost surely, 2^321929423 is an apocalyptic number.

321929423 is a deficient number, since it is larger than the sum of its proper divisors (53737).

321929423 is an equidigital number, since it uses as much as digits as its factorization.

321929423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53736.

The product of its digits is 23328, while the sum is 35.

The square root of 321929423 is about 17942.3917859353. The cubic root of 321929423 is about 685.3623195563.

The spelling of 321929423 in words is "three hundred twenty-one million, nine hundred twenty-nine thousand, four hundred twenty-three".