8420889599 has 4 divisors (see below), whose sum is σ = 8916236064. Its totient is φ = 7925543136.

The previous prime is 8420889541. The next prime is 8420889601. The reversal of 8420889599 is 9959880248.

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 8420889599 - 2³² = 4125922303 is a prime.

It is a super-2 number, since 2×8420889599² (a number of 21 digits) 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 (8420889299) 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, 247673207 + ... + 247673240.

It is an arithmetic number, because the mean of its divisors is an integer number (2229059016).

Almost surely, 2^8420889599 is an apocalyptic number.

8420889599 is a deficient number, since it is larger than the sum of its proper divisors (495346465).

8420889599 is a wasteful number, since it uses less digits than its factorization.

8420889599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495346464.

The product of its (nonzero) digits is 14929920, while the sum is 62.

The square root of 8420889599 is about 91765.4052407551. The cubic root of 8420889599 is about 2034.4764069778.

The spelling of 8420889599 in words is "eight billion, four hundred twenty million, eight hundred eighty-nine thousand, five hundred ninety-nine".