402334321 has 2 divisors, whose sum is σ = 402334322. Its totient is φ = 402334320.

The previous prime is 402334319. The next prime is 402334333. The reversal of 402334321 is 123433204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401441296 + 893025 = 20036^2 + 945^2 .

It is a cyclic number.

It is not a de Polignac number, because 402334321 - 2¹ = 402334319 is a prime.

Together with 402334319, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 402334292 and 402334301.

It is not a weakly prime, because it can be changed into another prime (402334301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201167160 + 201167161.

It is an arithmetic number, because the mean of its divisors is an integer number (201167161).

Almost surely, 2^402334321 is an apocalyptic number.

It is an amenable number.

402334321 is a deficient number, since it is larger than the sum of its proper divisors (1).

402334321 is an equidigital number, since it uses as much as digits as its factorization.

402334321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 402334321 is about 20058.2731310549. The cubic root of 402334321 is about 738.2368059577.

Adding to 402334321 its reverse (123433204), we get a palindrome (525767525).

The spelling of 402334321 in words is "four hundred two million, three hundred thirty-four thousand, three hundred twenty-one".