345488321 has 2 divisors, whose sum is σ = 345488322. Its totient is φ = 345488320.

The previous prime is 345488309. The next prime is 345488329. The reversal of 345488321 is 123884543.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314530225 + 30958096 = 17735^2 + 5564^2 .

It is an emirp because it is prime and its reverse (123884543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345488321 - 2⁶ = 345488257 is a prime.

It is not a weakly prime, because it can be changed into another prime (345488329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172744160 + 172744161.

It is an arithmetic number, because the mean of its divisors is an integer number (172744161).

Almost surely, 2^345488321 is an apocalyptic number.

It is an amenable number.

345488321 is a deficient number, since it is larger than the sum of its proper divisors (1).

345488321 is an equidigital number, since it uses as much as digits as its factorization.

345488321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 38.

The square root of 345488321 is about 18587.3161322446. The cubic root of 345488321 is about 701.6886584309.

The spelling of 345488321 in words is "three hundred forty-five million, four hundred eighty-eight thousand, three hundred twenty-one".