343980705 has 16 divisors (see below), whose sum is σ = 550615104. Its totient is φ = 183374400.

The previous prime is 343980697. The next prime is 343980719. The reversal of 343980705 is 507089343.

343980705 = 4363² + 4364² + ... + 4380².

It is not a de Polignac number, because 343980705 - 2³ = 343980697 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46042 + ... + 52988.

It is an arithmetic number, because the mean of its divisors is an integer number (34413444).

Almost surely, 2^343980705 is an apocalyptic number.

It is an amenable number.

343980705 is a deficient number, since it is larger than the sum of its proper divisors (206634399).

343980705 is a wasteful number, since it uses less digits than its factorization.

343980705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10256.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 343980705 is about 18546.7168253575. The cubic root of 343980705 is about 700.6665114321. Note that the first 3 decimals are identical.

The spelling of 343980705 in words is "three hundred forty-three million, nine hundred eighty thousand, seven hundred five".