8938637489 has 4 divisors (see below), whose sum is σ = 9180222324. Its totient is φ = 8697052656.

The previous prime is 8938637467. The next prime is 8938637503. The reversal of 8938637489 is 9847368398.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8488858225 + 449779264 = 92135^2 + 21208^2 .

It is a cyclic number.

It is not a de Polignac number, because 8938637489 - 2²⁴ = 8921860273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8938637089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120792362 + ... + 120792435.

It is an arithmetic number, because the mean of its divisors is an integer number (2295055581).

Almost surely, 2^8938637489 is an apocalyptic number.

It is an amenable number.

8938637489 is a deficient number, since it is larger than the sum of its proper divisors (241584835).

8938637489 is a wasteful number, since it uses less digits than its factorization.

8938637489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241584834.

The product of its digits is 62705664, while the sum is 65.

The square root of 8938637489 is about 94544.3678333088. The cubic root of 8938637489 is about 2075.3456617938.

The spelling of 8938637489 in words is "eight billion, nine hundred thirty-eight million, six hundred thirty-seven thousand, four hundred eighty-nine".