345011321 has 2 divisors, whose sum is σ = 345011322. Its totient is φ = 345011320.

The previous prime is 345011299. The next prime is 345011357. The reversal of 345011321 is 123110543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343583296 + 1428025 = 18536^2 + 1195^2 .

It is an emirp because it is prime and its reverse (123110543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345011321 - 2²² = 340817017 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 345011293 and 345011302.

It is not a weakly prime, because it can be changed into another prime (345011371) 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, 172505660 + 172505661.

It is an arithmetic number, because the mean of its divisors is an integer number (172505661).

Almost surely, 2^345011321 is an apocalyptic number.

It is an amenable number.

345011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

345011321 is an equidigital number, since it uses as much as digits as its factorization.

345011321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 345011321 is about 18574.4803695823. The cubic root of 345011321 is about 701.3655798341.

Adding to 345011321 its reverse (123110543), we get a palindrome (468121864).

The spelling of 345011321 in words is "three hundred forty-five million, eleven thousand, three hundred twenty-one".