426888623 has 4 divisors (see below), whose sum is σ = 487872720. Its totient is φ = 365904528.

The previous prime is 426888619. The next prime is 426888641. The reversal of 426888623 is 326888624.

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 426888623 - 2² = 426888619 is a prime.

It is a super-3 number, since 3×426888623³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426888653) 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, 30492038 + ... + 30492051.

It is an arithmetic number, because the mean of its divisors is an integer number (121968180).

Almost surely, 2^426888623 is an apocalyptic number.

426888623 is a deficient number, since it is larger than the sum of its proper divisors (60984097).

426888623 is an equidigital number, since it uses as much as digits as its factorization.

426888623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60984096.

The product of its digits is 884736, while the sum is 47.

The square root of 426888623 is about 20661.2831886115. The cubic root of 426888623 is about 752.9593435413.

Subtracting from 426888623 its reverse (326888624), we obtain a palindrome (99999999).

The spelling of 426888623 in words is "four hundred twenty-six million, eight hundred eighty-eight thousand, six hundred twenty-three".