346000920721 has 4 divisors (see below), whose sum is σ = 346012447012. Its totient is φ = 345989394432.

The previous prime is 346000920709. The next prime is 346000920743. The reversal of 346000920721 is 127029000643.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127029000643 = 29 ⋅4380310367.

It can be written as a sum of positive squares in 2 ways, for example, as 1121915025 + 344879005696 = 33495^2 + 587264^2 .

It is a cyclic number.

It is not a de Polignac number, because 346000920721 - 2⁵ = 346000920689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (346000920761) 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, 5718000 + ... + 5778193.

It is an arithmetic number, because the mean of its divisors is an integer number (86503111753).

Almost surely, 2^346000920721 is an apocalyptic number.

It is an amenable number.

346000920721 is a deficient number, since it is larger than the sum of its proper divisors (11526291).

346000920721 is a wasteful number, since it uses less digits than its factorization.

346000920721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11526290.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 346000920721 in words is "three hundred forty-six billion, nine hundred twenty thousand, seven hundred twenty-one".