1423434421 has 2 divisors, whose sum is σ = 1423434422. Its totient is φ = 1423434420.

The previous prime is 1423434407. The next prime is 1423434431. The reversal of 1423434421 is 1244343241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 757020196 + 666414225 = 27514^2 + 25815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423434421 - 2²⁵ = 1389879989 is a prime.

It is a super-3 number, since 3×1423434421³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1423434421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423434401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711717210 + 711717211.

It is an arithmetic number, because the mean of its divisors is an integer number (711717211).

Almost surely, 2^1423434421 is an apocalyptic number.

It is an amenable number.

1423434421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423434421 is an equidigital number, since it uses as much as digits as its factorization.

1423434421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 28.

The square root of 1423434421 is about 37728.4298772159. The cubic root of 1423434421 is about 1124.8962988528.

Adding to 1423434421 its reverse (1244343241), we get a palindrome (2667777662).

The spelling of 1423434421 in words is "one billion, four hundred twenty-three million, four hundred thirty-four thousand, four hundred twenty-one".