421334413 has 4 divisors (see below), whose sum is σ = 426667840. Its totient is φ = 416000988.

The previous prime is 421334411. The next prime is 421334449. The reversal of 421334413 is 314433124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421334413 - 2¹ = 421334411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421334411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2666595 + ... + 2666752.

It is an arithmetic number, because the mean of its divisors is an integer number (106666960).

Almost surely, 2^421334413 is an apocalyptic number.

It is an amenable number.

421334413 is a deficient number, since it is larger than the sum of its proper divisors (5333427).

421334413 is an equidigital number, since it uses as much as digits as its factorization.

421334413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5333426.

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

The square root of 421334413 is about 20526.4320572281. The cubic root of 421334413 is about 749.6795152203.

Adding to 421334413 its reverse (314433124), we get a palindrome (735767537).

The spelling of 421334413 in words is "four hundred twenty-one million, three hundred thirty-four thousand, four hundred thirteen".