321048109 has 2 divisors, whose sum is σ = 321048110. Its totient is φ = 321048108.

The previous prime is 321048089. The next prime is 321048113. The reversal of 321048109 is 901840123.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301994884 + 19053225 = 17378^2 + 4365^2 .

It is a cyclic number.

It is not a de Polignac number, because 321048109 - 2¹⁵ = 321015341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321048139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160524054 + 160524055.

It is an arithmetic number, because the mean of its divisors is an integer number (160524055).

Almost surely, 2^321048109 is an apocalyptic number.

It is an amenable number.

321048109 is a deficient number, since it is larger than the sum of its proper divisors (1).

321048109 is an equidigital number, since it uses as much as digits as its factorization.

321048109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 321048109 is about 17917.8154081350. The cubic root of 321048109 is about 684.7363320035.

The spelling of 321048109 in words is "three hundred twenty-one million, forty-eight thousand, one hundred nine".