345334421 has 2 divisors, whose sum is σ = 345334422. Its totient is φ = 345334420.

The previous prime is 345334417. The next prime is 345334439. The reversal of 345334421 is 124433543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268140625 + 77193796 = 16375^2 + 8786^2 .

It is a cyclic number.

It is not a de Polignac number, because 345334421 - 2² = 345334417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345334621) 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, 172667210 + 172667211.

It is an arithmetic number, because the mean of its divisors is an integer number (172667211).

Almost surely, 2^345334421 is an apocalyptic number.

It is an amenable number.

345334421 is a deficient number, since it is larger than the sum of its proper divisors (1).

345334421 is an equidigital number, since it uses as much as digits as its factorization.

345334421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 29.

The square root of 345334421 is about 18583.1757512003. The cubic root of 345334421 is about 701.5844523773.

Adding to 345334421 its reverse (124433543), we get a palindrome (469767964).

The spelling of 345334421 in words is "three hundred forty-five million, three hundred thirty-four thousand, four hundred twenty-one".