321421097 has 8 divisors (see below), whose sum is σ = 331170120. Its totient is φ = 311808640.

The previous prime is 321421073. The next prime is 321421141. The reversal of 321421097 is 790124123.

It can be written as a sum of positive squares in 4 ways, for example, as 151321 + 321269776 = 389^2 + 17924^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321421097 - 2¹² = 321417001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321421897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29354 + ... + 38787.

It is an arithmetic number, because the mean of its divisors is an integer number (41396265).

Almost surely, 2^321421097 is an apocalyptic number.

It is an amenable number.

321421097 is a deficient number, since it is larger than the sum of its proper divisors (9749023).

321421097 is an equidigital number, since it uses as much as digits as its factorization.

321421097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68283.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 321421097 is about 17928.2206869505. The cubic root of 321421097 is about 685.0014008887.

The spelling of 321421097 in words is "three hundred twenty-one million, four hundred twenty-one thousand, ninety-seven".