354234432421 has 2 divisors, whose sum is σ = 354234432422. Its totient is φ = 354234432420.

The previous prime is 354234432407. The next prime is 354234432439. The reversal of 354234432421 is 124234432453.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235502501796 + 118731930625 = 485286^2 + 344575^2 .

It is a cyclic number.

It is not a de Polignac number, because 354234432421 - 2⁹ = 354234431909 is a prime.

It is a super-3 number, since 3×354234432421³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354234402421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177117216210 + 177117216211.

It is an arithmetic number, because the mean of its divisors is an integer number (177117216211).

Almost surely, 2^354234432421 is an apocalyptic number.

It is an amenable number.

354234432421 is a deficient number, since it is larger than the sum of its proper divisors (1).

354234432421 is an equidigital number, since it uses as much as digits as its factorization.

354234432421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 37.

Adding to 354234432421 its reverse (124234432453), we get a palindrome (478468864874).

The spelling of 354234432421 in words is "three hundred fifty-four billion, two hundred thirty-four million, four hundred thirty-two thousand, four hundred twenty-one".