345659009 has 4 divisors (see below), whose sum is σ = 353013504. Its totient is φ = 338304516.

The previous prime is 345658979. The next prime is 345659051. The reversal of 345659009 is 900956543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 900956543 = 29 ⋅31067467.

It is a cyclic number.

It is not a de Polignac number, because 345659009 - 2²⁰ = 344610433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345659099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3677177 + ... + 3677270.

It is an arithmetic number, because the mean of its divisors is an integer number (88253376).

Almost surely, 2^345659009 is an apocalyptic number.

It is an amenable number.

345659009 is a deficient number, since it is larger than the sum of its proper divisors (7354495).

345659009 is an equidigital number, since it uses as much as digits as its factorization.

345659009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7354494.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 345659009 is about 18591.9070834597. The cubic root of 345659009 is about 701.8041954913.

The spelling of 345659009 in words is "three hundred forty-five million, six hundred fifty-nine thousand, nine".