309234109 has 2 divisors, whose sum is σ = 309234110. Its totient is φ = 309234108.

The previous prime is 309234091. The next prime is 309234217. The reversal of 309234109 is 901432903.

Together with previous prime (309234091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271755225 + 37478884 = 16485^2 + 6122^2 .

It is a cyclic number.

It is not a de Polignac number, because 309234109 - 2¹¹ = 309232061 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309232109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154617054 + 154617055.

It is an arithmetic number, because the mean of its divisors is an integer number (154617055).

Almost surely, 2^309234109 is an apocalyptic number.

It is an amenable number.

309234109 is a deficient number, since it is larger than the sum of its proper divisors (1).

309234109 is an equidigital number, since it uses as much as digits as its factorization.

309234109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 309234109 is about 17585.0535683006. The cubic root of 309234109 is about 676.2321228517.

The spelling of 309234109 in words is "three hundred nine million, two hundred thirty-four thousand, one hundred nine".