343674721 has 4 divisors (see below), whose sum is σ = 370111252. Its totient is φ = 317238192.

The previous prime is 343674713. The next prime is 343674739. The reversal of 343674721 is 127476343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127476343 = 2441 ⋅52223.

It can be written as a sum of positive squares in 2 ways, for example, as 26122321 + 317552400 = 5111^2 + 17820^2 .

It is a cyclic number.

It is not a de Polignac number, because 343674721 - 2³ = 343674713 is a prime.

It is a super-2 number, since 2×343674721² = 236224627708855682, which contains 22 as substring.

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 (343674421) 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, 13218246 + ... + 13218271.

It is an arithmetic number, because the mean of its divisors is an integer number (92527813).

Almost surely, 2^343674721 is an apocalyptic number.

It is an amenable number.

343674721 is a deficient number, since it is larger than the sum of its proper divisors (26436531).

343674721 is a wasteful number, since it uses less digits than its factorization.

343674721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26436530.

The product of its digits is 84672, while the sum is 37.

The square root of 343674721 is about 18538.4659829232. The cubic root of 343674721 is about 700.4586932412.

The spelling of 343674721 in words is "three hundred forty-three million, six hundred seventy-four thousand, seven hundred twenty-one".