234812309 has 2 divisors, whose sum is σ = 234812310. Its totient is φ = 234812308.

The previous prime is 234812299. The next prime is 234812339. The reversal of 234812309 is 903218432.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202265284 + 32547025 = 14222^2 + 5705^2 .

It is a cyclic number.

It is not a de Polignac number, because 234812309 - 2²⁴ = 218035093 is a prime.

It is a super-2 number, since 2×234812309² = 110273640915822962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234812339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117406154 + 117406155.

It is an arithmetic number, because the mean of its divisors is an integer number (117406155).

Almost surely, 2^234812309 is an apocalyptic number.

It is an amenable number.

234812309 is a deficient number, since it is larger than the sum of its proper divisors (1).

234812309 is an equidigital number, since it uses as much as digits as its factorization.

234812309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 234812309 is about 15323.5866885008. The cubic root of 234812309 is about 616.9362458391.

The spelling of 234812309 in words is "two hundred thirty-four million, eight hundred twelve thousand, three hundred nine".