403434321421 has 2 divisors, whose sum is σ = 403434321422. Its totient is φ = 403434321420.

The previous prime is 403434321413. The next prime is 403434321467. The reversal of 403434321421 is 124123434304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244640041321 + 158794280100 = 494611^2 + 398490^2 .

It is a cyclic number.

It is not a de Polignac number, because 403434321421 - 2³ = 403434321413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403434321491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201717160710 + 201717160711.

It is an arithmetic number, because the mean of its divisors is an integer number (201717160711).

Almost surely, 2^403434321421 is an apocalyptic number.

It is an amenable number.

403434321421 is a deficient number, since it is larger than the sum of its proper divisors (1).

403434321421 is an equidigital number, since it uses as much as digits as its factorization.

403434321421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 403434321421 its reverse (124123434304), we get a palindrome (527557755725).

The spelling of 403434321421 in words is "four hundred three billion, four hundred thirty-four million, three hundred twenty-one thousand, four hundred twenty-one".