345140449 has 2 divisors, whose sum is σ = 345140450. Its totient is φ = 345140448.

The previous prime is 345140447. The next prime is 345140527. The reversal of 345140449 is 944041543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309056400 + 36084049 = 17580^2 + 6007^2 .

It is a cyclic number.

It is not a de Polignac number, because 345140449 - 2¹ = 345140447 is a prime.

Together with 345140447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (345140441) 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, 172570224 + 172570225.

It is an arithmetic number, because the mean of its divisors is an integer number (172570225).

Almost surely, 2^345140449 is an apocalyptic number.

It is an amenable number.

345140449 is a deficient number, since it is larger than the sum of its proper divisors (1).

345140449 is an equidigital number, since it uses as much as digits as its factorization.

345140449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 345140449 is about 18577.9559962876. The cubic root of 345140449 is about 701.4530693672.

The spelling of 345140449 in words is "three hundred forty-five million, one hundred forty thousand, four hundred forty-nine".