343128609 has 16 divisors (see below), whose sum is σ = 525868800. Its totient is φ = 220863888.

The previous prime is 343128593. The next prime is 343128647. The reversal of 343128609 is 906821343.

343128609 is a `hidden beast` number, since 3 + 43 + 1 + 2 + 8 + 609 = 666.

It is not a de Polignac number, because 343128609 - 2⁴ = 343128593 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (343128109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218329 + ... + 219894.

It is an arithmetic number, because the mean of its divisors is an integer number (32866800).

Almost surely, 2^343128609 is an apocalyptic number.

It is an amenable number.

343128609 is a deficient number, since it is larger than the sum of its proper divisors (182740191).

343128609 is a wasteful number, since it uses less digits than its factorization.

343128609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438261 (or 438255 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 343128609 is about 18523.7309686791. The cubic root of 343128609 is about 700.0874781831.

The spelling of 343128609 in words is "three hundred forty-three million, one hundred twenty-eight thousand, six hundred nine".