345505441 has 2 divisors, whose sum is σ = 345505442. Its totient is φ = 345505440.

The previous prime is 345505427. The next prime is 345505451. The reversal of 345505441 is 144505543.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305550400 + 39955041 = 17480^2 + 6321^2 .

It is a cyclic number.

It is not a de Polignac number, because 345505441 - 2⁷ = 345505313 is a prime.

It is not a weakly prime, because it can be changed into another prime (345505421) 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 as a sum of consecutive naturals, namely, 172752720 + 172752721.

It is an arithmetic number, because the mean of its divisors is an integer number (172752721).

Almost surely, 2^345505441 is an apocalyptic number.

It is an amenable number.

345505441 is a deficient number, since it is larger than the sum of its proper divisors (1).

345505441 is an equidigital number, since it uses as much as digits as its factorization.

345505441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 345505441 is about 18587.7766556412. The cubic root of 345505441 is about 701.7002485104.

The spelling of 345505441 in words is "three hundred forty-five million, five hundred five thousand, four hundred forty-one".