426323623 has 4 divisors (see below), whose sum is σ = 465080328. Its totient is φ = 387566920.

The previous prime is 426323549. The next prime is 426323627. The reversal of 426323623 is 326323624.

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 426323623 - 2¹⁷ = 426192551 is a prime.

It is a super-2 number, since 2×426323623² = 363503663055692258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426323627) 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, 19378336 + ... + 19378357.

It is an arithmetic number, because the mean of its divisors is an integer number (116270082).

Almost surely, 2^426323623 is an apocalyptic number.

426323623 is a deficient number, since it is larger than the sum of its proper divisors (38756705).

426323623 is a wasteful number, since it uses less digits than its factorization.

426323623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38756704.

The product of its digits is 31104, while the sum is 31.

The square root of 426323623 is about 20647.6057449768. The cubic root of 426323623 is about 752.6270087272.

Subtracting from 426323623 its reverse (326323624), we obtain a palindrome (99999999).

The spelling of 426323623 in words is "four hundred twenty-six million, three hundred twenty-three thousand, six hundred twenty-three".