345299999 has 8 divisors (see below), whose sum is σ = 379805520. Its totient is φ = 313907880.

The previous prime is 345299993. The next prime is 345300017. The reversal of 345299999 is 999992543.

It is not a de Polignac number, because 345299999 - 2¹² = 345295903 is a prime.

It is a Duffinian number.

345299999 is a modest number, since divided by 99999 gives 3452 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345299993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128384 + ... + 131045.

It is an arithmetic number, because the mean of its divisors is an integer number (47475690).

Almost surely, 2^345299999 is an apocalyptic number.

345299999 is a deficient number, since it is larger than the sum of its proper divisors (34505521).

345299999 is an equidigital number, since it uses as much as digits as its factorization.

345299999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259462 (or 259440 counting only the distinct ones).

The product of its digits is 7085880, while the sum is 59.

The square root of 345299999 is about 18582.2495677999. The cubic root of 345299999 is about 701.5611409233.

The spelling of 345299999 in words is "three hundred forty-five million, two hundred ninety-nine thousand, nine hundred ninety-nine".