423232391 has 16 divisors (see below), whose sum is σ = 473758560. Its totient is φ = 375736320.

The previous prime is 423232379. The next prime is 423232427. The reversal of 423232391 is 193232324.

It is a cyclic number.

It is not a de Polignac number, because 423232391 - 2²⁶ = 356123527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423232301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75125 + ... + 80561.

It is an arithmetic number, because the mean of its divisors is an integer number (29609910).

Almost surely, 2^423232391 is an apocalyptic number.

423232391 is a deficient number, since it is larger than the sum of its proper divisors (50526169).

423232391 is a wasteful number, since it uses less digits than its factorization.

423232391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5714.

The product of its digits is 7776, while the sum is 29.

The square root of 423232391 is about 20572.6126439983. The cubic root of 423232391 is about 750.8035186880.

The spelling of 423232391 in words is "four hundred twenty-three million, two hundred thirty-two thousand, three hundred ninety-one".