423934591 has 4 divisors (see below), whose sum is σ = 423982000. Its totient is φ = 423887184.

The previous prime is 423934583. The next prime is 423934663. The reversal of 423934591 is 195439324.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 423934591 - 2³ = 423934583 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 (423934541) 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 in 3 ways as a sum of consecutive naturals, for example, 5766 + ... + 29683.

It is an arithmetic number, because the mean of its divisors is an integer number (105995500).

Almost surely, 2^423934591 is an apocalyptic number.

423934591 is a deficient number, since it is larger than the sum of its proper divisors (47409).

423934591 is a wasteful number, since it uses less digits than its factorization.

423934591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47408.

The product of its digits is 116640, while the sum is 40.

The square root of 423934591 is about 20589.6719497907. The cubic root of 423934591 is about 751.2185175848.

The spelling of 423934591 in words is "four hundred twenty-three million, nine hundred thirty-four thousand, five hundred ninety-one".