321436429 has 4 divisors (see below), whose sum is σ = 323068284. Its totient is φ = 319804576.

The previous prime is 321436421. The next prime is 321436457. The reversal of 321436429 is 924634123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 924634123 = 7 ⋅132090589.

It can be written as a sum of positive squares in 2 ways, for example, as 317018025 + 4418404 = 17805^2 + 2102^2 .

It is a cyclic number.

It is not a de Polignac number, because 321436429 - 2³ = 321436421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321436394 and 321436403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321436421) 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, 815632 + ... + 816025.

It is an arithmetic number, because the mean of its divisors is an integer number (80767071).

Almost surely, 2^321436429 is an apocalyptic number.

It is an amenable number.

321436429 is a deficient number, since it is larger than the sum of its proper divisors (1631855).

321436429 is a wasteful number, since it uses less digits than its factorization.

321436429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631854.

The product of its digits is 31104, while the sum is 34.

The square root of 321436429 is about 17928.6482758740. The cubic root of 321436429 is about 685.0122923896.

The spelling of 321436429 in words is "three hundred twenty-one million, four hundred thirty-six thousand, four hundred twenty-nine".