345189329 has 2 divisors, whose sum is σ = 345189330. Its totient is φ = 345189328.

The previous prime is 345189311. The next prime is 345189331. The reversal of 345189329 is 923981543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263250625 + 81938704 = 16225^2 + 9052^2 .

It is a cyclic number.

It is not a de Polignac number, because 345189329 - 2⁸ = 345189073 is a prime.

Together with 345189331, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345189329.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172594664 + 172594665.

It is an arithmetic number, because the mean of its divisors is an integer number (172594665).

Almost surely, 2^345189329 is an apocalyptic number.

It is an amenable number.

345189329 is a deficient number, since it is larger than the sum of its proper divisors (1).

345189329 is an equidigital number, since it uses as much as digits as its factorization.

345189329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 345189329 is about 18579.2714873323. The cubic root of 345189329 is about 701.4861818847.

The spelling of 345189329 in words is "three hundred forty-five million, one hundred eighty-nine thousand, three hundred twenty-nine".