421434469 has 2 divisors, whose sum is σ = 421434470. Its totient is φ = 421434468.

The previous prime is 421434413. The next prime is 421434473. The reversal of 421434469 is 964434124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294534244 + 126900225 = 17162^2 + 11265^2 .

It is a cyclic number.

It is not a de Polignac number, because 421434469 - 2⁷ = 421434341 is a prime.

It is a super-2 number, since 2×421434469² = 355214023322623922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421434479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210717234 + 210717235.

It is an arithmetic number, because the mean of its divisors is an integer number (210717235).

Almost surely, 2^421434469 is an apocalyptic number.

It is an amenable number.

421434469 is a deficient number, since it is larger than the sum of its proper divisors (1).

421434469 is an equidigital number, since it uses as much as digits as its factorization.

421434469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 37.

The square root of 421434469 is about 20528.8691602826. The cubic root of 421434469 is about 749.7388536733.

It can be divided in two parts, 4214 and 34469, that added together give a palindrome (38683).

The spelling of 421434469 in words is "four hundred twenty-one million, four hundred thirty-four thousand, four hundred sixty-nine".