67834309 has 2 divisors, whose sum is σ = 67834310. Its totient is φ = 67834308.

The previous prime is 67834303. The next prime is 67834321. The reversal of 67834309 is 90343876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66341025 + 1493284 = 8145^2 + 1222^2 .

It is a cyclic number.

It is not a de Polignac number, because 67834309 - 2¹⁵ = 67801541 is a prime.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67834303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33917154 + 33917155.

It is an arithmetic number, because the mean of its divisors is an integer number (33917155).

Almost surely, 2^67834309 is an apocalyptic number.

It is an amenable number.

67834309 is a deficient number, since it is larger than the sum of its proper divisors (1).

67834309 is an equidigital number, since it uses as much as digits as its factorization.

67834309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 67834309 is about 8236.1586313038. The cubic root of 67834309 is about 407.8337241363.

The spelling of 67834309 in words is "sixty-seven million, eight hundred thirty-four thousand, three hundred nine".