234212309 has 2 divisors, whose sum is σ = 234212310. Its totient is φ = 234212308.

The previous prime is 234212287. The next prime is 234212351. The reversal of 234212309 is 903212432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127193284 + 107019025 = 11278^2 + 10345^2 .

It is a cyclic number.

It is not a de Polignac number, because 234212309 - 2⁸ = 234212053 is a prime.

It is a super-2 number, since 2×234212309² = 109710811374222962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234212509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117106154 + 117106155.

It is an arithmetic number, because the mean of its divisors is an integer number (117106155).

Almost surely, 2^234212309 is an apocalyptic number.

It is an amenable number.

234212309 is a deficient number, since it is larger than the sum of its proper divisors (1).

234212309 is an equidigital number, since it uses as much as digits as its factorization.

234212309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 234212309 is about 15303.9965041815. The cubic root of 234212309 is about 616.4103258245.

The spelling of 234212309 in words is "two hundred thirty-four million, two hundred twelve thousand, three hundred nine".