426181623 has 8 divisors (see below), whose sum is σ = 649419648. Its totient is φ = 243532344.

The previous prime is 426181621. The next prime is 426181631. The reversal of 426181623 is 326181624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 426181623 - 2¹ = 426181621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426181621) 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 7 ways as a sum of consecutive naturals, for example, 10147161 + ... + 10147202.

It is an arithmetic number, because the mean of its divisors is an integer number (81177456).

Almost surely, 2^426181623 is an apocalyptic number.

426181623 is a deficient number, since it is larger than the sum of its proper divisors (223238025).

426181623 is a wasteful number, since it uses less digits than its factorization.

426181623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20294373.

The product of its digits is 13824, while the sum is 33.

The square root of 426181623 is about 20644.1668032401. The cubic root of 426181623 is about 752.5434377047.

Subtracting from 426181623 its reverse (326181624), we obtain a palindrome (99999999).

The spelling of 426181623 in words is "four hundred twenty-six million, one hundred eighty-one thousand, six hundred twenty-three".