345980641 has 4 divisors (see below), whose sum is σ = 346143492. Its totient is φ = 345817792.

The previous prime is 345980627. The next prime is 345980669. The reversal of 345980641 is 146089543.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100400400 + 245580241 = 10020^2 + 15671^2 .

It is a cyclic number.

It is not a de Polignac number, because 345980641 - 2¹¹ = 345978593 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345980594 and 345980603.

It is not an unprimeable number, because it can be changed into a prime (345980441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78196 + ... + 82501.

It is an arithmetic number, because the mean of its divisors is an integer number (86535873).

Almost surely, 2^345980641 is an apocalyptic number.

It is an amenable number.

345980641 is a deficient number, since it is larger than the sum of its proper divisors (162851).

345980641 is a wasteful number, since it uses less digits than its factorization.

345980641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162850.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 345980641 is about 18600.5548573154. The cubic root of 345980641 is about 702.0218017704.

It can be divided in two parts, 3459 and 80641, that added together give a square (84100 = 290²).

The spelling of 345980641 in words is "three hundred forty-five million, nine hundred eighty thousand, six hundred forty-one".