8638469319 has 4 divisors (see below), whose sum is σ = 11517959096. Its totient is φ = 5758979544.

The previous prime is 8638469309. The next prime is 8638469351. The reversal of 8638469319 is 9139648368.

It is a happy number.

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

It is not a de Polignac number, because 8638469319 - 2²¹ = 8636372167 is a prime.

It is a super-2 number, since 2×8638469319² (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 (8638469309) 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, 1439744884 + ... + 1439744889.

It is an arithmetic number, because the mean of its divisors is an integer number (2879489774).

Almost surely, 2^8638469319 is an apocalyptic number.

8638469319 is a deficient number, since it is larger than the sum of its proper divisors (2879489777).

8638469319 is a wasteful number, since it uses less digits than its factorization.

8638469319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879489776.

The product of its digits is 6718464, while the sum is 57.

The square root of 8638469319 is about 92943.3661914609. The cubic root of 8638469319 is about 2051.8499516474.

The spelling of 8638469319 in words is "eight billion, six hundred thirty-eight million, four hundred sixty-nine thousand, three hundred nineteen".