343670785 has 4 divisors (see below), whose sum is σ = 412404948. Its totient is φ = 274936624.

The previous prime is 343670783. The next prime is 343670797. The reversal of 343670785 is 587076343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 587076343 = 7 ⋅83868049.

It can be written as a sum of positive squares in 2 ways, for example, as 227527056 + 116143729 = 15084^2 + 10777^2 .

It is a cyclic number.

It is not a de Polignac number, because 343670785 - 2¹ = 343670783 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343670783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34367074 + ... + 34367083.

It is an arithmetic number, because the mean of its divisors is an integer number (103101237).

It is a Proth number, since it is equal to 1311 ⋅ 2¹⁸ + 1 and 1311 < 2¹⁸.

Almost surely, 2^343670785 is an apocalyptic number.

It is an amenable number.

343670785 is a deficient number, since it is larger than the sum of its proper divisors (68734163).

343670785 is an equidigital number, since it uses as much as digits as its factorization.

343670785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68734162.

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 343670785 is about 18538.3598249683. The cubic root of 343670785 is about 700.4560191856.

The spelling of 343670785 in words is "three hundred forty-three million, six hundred seventy thousand, seven hundred eighty-five".