423931581547 has 4 divisors (see below), whose sum is σ = 429738863560. Its totient is φ = 418124299536.

The previous prime is 423931581499. The next prime is 423931581551. The reversal of 423931581547 is 745185139324.

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

It is a cyclic number.

It is not a de Polignac number, because 423931581547 - 2¹¹ = 423931579499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423931581494 and 423931581503.

It is not an unprimeable number, because it can be changed into a prime (423931581247) 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, 2903640897 + ... + 2903641042.

It is an arithmetic number, because the mean of its divisors is an integer number (107434715890).

Almost surely, 2^423931581547 is an apocalyptic number.

423931581547 is a deficient number, since it is larger than the sum of its proper divisors (5807282013).

423931581547 is an equidigital number, since it uses as much as digits as its factorization.

423931581547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5807282012.

The product of its digits is 3628800, while the sum is 52.

The spelling of 423931581547 in words is "four hundred twenty-three billion, nine hundred thirty-one million, five hundred eighty-one thousand, five hundred forty-seven".