321148109 has 2 divisors, whose sum is σ = 321148110. Its totient is φ = 321148108.

The previous prime is 321148019. The next prime is 321148169. The reversal of 321148109 is 901841123.

Together with previous prime (321148019) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319622884 + 1525225 = 17878^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 321148109 - 2²⁴ = 304370893 is a prime.

It is a super-2 number, since 2×321148109² = 206272215828551762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321148169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160574054 + 160574055.

It is an arithmetic number, because the mean of its divisors is an integer number (160574055).

Almost surely, 2^321148109 is an apocalyptic number.

It is an amenable number.

321148109 is a deficient number, since it is larger than the sum of its proper divisors (1).

321148109 is an equidigital number, since it uses as much as digits as its factorization.

321148109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 321148109 is about 17920.6057096293. The cubic root of 321148109 is about 684.8074184681.

The spelling of 321148109 in words is "three hundred twenty-one million, one hundred forty-eight thousand, one hundred nine".