345203449 has 2 divisors, whose sum is σ = 345203450. Its totient is φ = 345203448.

The previous prime is 345203447. The next prime is 345203473. The reversal of 345203449 is 944302543.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248535225 + 96668224 = 15765^2 + 9832^2 .

It is an emirp because it is prime and its reverse (944302543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345203449 - 2¹ = 345203447 is a prime.

Together with 345203447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (345203447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172601724 + 172601725.

It is an arithmetic number, because the mean of its divisors is an integer number (172601725).

Almost surely, 2^345203449 is an apocalyptic number.

It is an amenable number.

345203449 is a deficient number, since it is larger than the sum of its proper divisors (1).

345203449 is an equidigital number, since it uses as much as digits as its factorization.

345203449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 345203449 is about 18579.6514768173. The cubic root of 345203449 is about 701.4957465391.

The spelling of 345203449 in words is "three hundred forty-five million, two hundred three thousand, four hundred forty-nine".