424333391 has 2 divisors, whose sum is σ = 424333392. Its totient is φ = 424333390.

The previous prime is 424333381. The next prime is 424333409. The reversal of 424333391 is 193333424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 424333391 - 2¹⁰ = 424332367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424333361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212166695 + 212166696.

It is an arithmetic number, because the mean of its divisors is an integer number (212166696).

Almost surely, 2^424333391 is an apocalyptic number.

424333391 is a deficient number, since it is larger than the sum of its proper divisors (1).

424333391 is an equidigital number, since it uses as much as digits as its factorization.

424333391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 32.

The square root of 424333391 is about 20599.3541403608. The cubic root of 424333391 is about 751.4540036393.

It can be divided in two parts, 4243333 and 91, that added together give a palindrome (4243424).

The spelling of 424333391 in words is "four hundred twenty-four million, three hundred thirty-three thousand, three hundred ninety-one".