346402321 has 2 divisors, whose sum is σ = 346402322. Its totient is φ = 346402320.

The previous prime is 346402283. The next prime is 346402349. The reversal of 346402321 is 123204643.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345216400 + 1185921 = 18580^2 + 1089^2 .

It is a cyclic number.

It is not a de Polignac number, because 346402321 - 2²³ = 338013713 is a prime.

It is not a weakly prime, because it can be changed into another prime (346402351) 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, 173201160 + 173201161.

It is an arithmetic number, because the mean of its divisors is an integer number (173201161).

Almost surely, 2^346402321 is an apocalyptic number.

It is an amenable number.

346402321 is a deficient number, since it is larger than the sum of its proper divisors (1).

346402321 is an equidigital number, since it uses as much as digits as its factorization.

346402321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 346402321 is about 18611.8865513413. The cubic root of 346402321 is about 702.3068932211.

Adding to 346402321 its reverse (123204643), we get a palindrome (469606964).

The spelling of 346402321 in words is "three hundred forty-six million, four hundred two thousand, three hundred twenty-one".