344402305421 has 2 divisors, whose sum is σ = 344402305422. Its totient is φ = 344402305420.

The previous prime is 344402305333. The next prime is 344402305427. The reversal of 344402305421 is 124503204443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343149924100 + 1252381321 = 585790^2 + 35389^2 .

It is a cyclic number.

It is not a de Polignac number, because 344402305421 - 2¹⁰ = 344402304397 is a prime.

It is a super-2 number, since 2×344402305421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344402305427) 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, 172201152710 + 172201152711.

It is an arithmetic number, because the mean of its divisors is an integer number (172201152711).

Almost surely, 2^344402305421 is an apocalyptic number.

It is an amenable number.

344402305421 is a deficient number, since it is larger than the sum of its proper divisors (1).

344402305421 is an equidigital number, since it uses as much as digits as its factorization.

344402305421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 344402305421 its reverse (124503204443), we get a palindrome (468905509864).

The spelling of 344402305421 in words is "three hundred forty-four billion, four hundred two million, three hundred five thousand, four hundred twenty-one".