345605089 has 2 divisors, whose sum is σ = 345605090. Its totient is φ = 345605088.

The previous prime is 345605069. The next prime is 345605131. The reversal of 345605089 is 980506543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342990400 + 2614689 = 18520^2 + 1617^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345605089 is a prime.

It is not a weakly prime, because it can be changed into another prime (345605009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172802544 + 172802545.

It is an arithmetic number, because the mean of its divisors is an integer number (172802545).

Almost surely, 2^345605089 is an apocalyptic number.

It is an amenable number.

345605089 is a deficient number, since it is larger than the sum of its proper divisors (1).

345605089 is an equidigital number, since it uses as much as digits as its factorization.

345605089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 345605089 is about 18590.4569335990. The cubic root of 345605089 is about 701.7677016742.

The spelling of 345605089 in words is "three hundred forty-five million, six hundred five thousand, eighty-nine".