433402421 has 4 divisors (see below), whose sum is σ = 437378700. Its totient is φ = 429426144.

The previous prime is 433402399. The next prime is 433402451. The reversal of 433402421 is 124204334.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 376942225 + 56460196 = 19415^2 + 7514^2 .

It is a cyclic number.

It is not a de Polignac number, because 433402421 - 2⁶ = 433402357 is a prime.

It is a super-2 number, since 2×433402421² = 375675317057322482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (433402451) 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, 1987976 + ... + 1988193.

It is an arithmetic number, because the mean of its divisors is an integer number (109344675).

Almost surely, 2^433402421 is an apocalyptic number.

It is an amenable number.

433402421 is a deficient number, since it is larger than the sum of its proper divisors (3976279).

433402421 is a wasteful number, since it uses less digits than its factorization.

433402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3976278.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 433402421 is about 20818.3193606016. The cubic root of 433402421 is about 756.7697739868.

Adding to 433402421 its reverse (124204334), we get a palindrome (557606755).

The spelling of 433402421 in words is "four hundred thirty-three million, four hundred two thousand, four hundred twenty-one".