345660643 has 4 divisors (see below), whose sum is σ = 365993640. Its totient is φ = 325327648.

The previous prime is 345660641. The next prime is 345660649. The reversal of 345660643 is 346066543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346066543 = 4289 ⋅80687.

It is a cyclic number.

It is not a de Polignac number, because 345660643 - 2¹ = 345660641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345660641) 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, 10166473 + ... + 10166506.

It is an arithmetic number, because the mean of its divisors is an integer number (91498410).

Almost surely, 2^345660643 is an apocalyptic number.

345660643 is a deficient number, since it is larger than the sum of its proper divisors (20332997).

345660643 is a wasteful number, since it uses less digits than its factorization.

345660643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20332996.

The product of its (nonzero) digits is 155520, while the sum is 37.

The square root of 345660643 is about 18591.9510272591. The cubic root of 345660643 is about 701.8053013463.

The spelling of 345660643 in words is "three hundred forty-five million, six hundred sixty thousand, six hundred forty-three".