343678109 has 2 divisors, whose sum is σ = 343678110. Its totient is φ = 343678108.

The previous prime is 343678091. The next prime is 343678117. The reversal of 343678109 is 901876343.

Together with previous prime (343678091) 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., 305200900 + 38477209 = 17470^2 + 6203^2 .

It is a cyclic number.

It is not a de Polignac number, because 343678109 - 2⁸ = 343677853 is a prime.

It is a super-2 number, since 2×343678109² = 236229285211631762, which contains 22 as substring.

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 (343878109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171839054 + 171839055.

It is an arithmetic number, because the mean of its divisors is an integer number (171839055).

Almost surely, 2^343678109 is an apocalyptic number.

It is an amenable number.

343678109 is a deficient number, since it is larger than the sum of its proper divisors (1).

343678109 is an equidigital number, since it uses as much as digits as its factorization.

343678109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 343678109 is about 18538.5573602694. The cubic root of 343678109 is about 700.4609949780.

The spelling of 343678109 in words is "three hundred forty-three million, six hundred seventy-eight thousand, one hundred nine".