343639189 has 2 divisors, whose sum is σ = 343639190. Its totient is φ = 343639188.

The previous prime is 343639171. The next prime is 343639193. The reversal of 343639189 is 981936343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 328878225 + 14760964 = 18135^2 + 3842^2 .

It is a cyclic number.

It is not a de Polignac number, because 343639189 - 2⁹ = 343638677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343639489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171819594 + 171819595.

It is an arithmetic number, because the mean of its divisors is an integer number (171819595).

Almost surely, 2^343639189 is an apocalyptic number.

It is an amenable number.

343639189 is a deficient number, since it is larger than the sum of its proper divisors (1).

343639189 is an equidigital number, since it uses as much as digits as its factorization.

343639189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 46.

The square root of 343639189 is about 18537.5076264313. The cubic root of 343639189 is about 700.4345526275.

The spelling of 343639189 in words is "three hundred forty-three million, six hundred thirty-nine thousand, one hundred eighty-nine".