8638029481 has 3 divisors (see below), whose sum is σ = 8638122423. Its totient is φ = 8637936540.

The previous prime is 8638029469. The next prime is 8638029487. The reversal of 8638029481 is 1849208368.

The square root of 8638029481 is 92941.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 22477081 + 8615552400 = 4741^2 + 92820^2 .

It is not a de Polignac number, because 8638029481 - 2²⁷ = 8503811753 is a prime.

It is a super-2 number, since 2×8638029481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8638029487) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 46471 + ... + 139411.

It is an arithmetic number, because the mean of its divisors is an integer number (2879374141).

Almost surely, 2^8638029481 is an apocalyptic number.

8638029481 is the 92941-st square number.

8638029481 is the 46471-st centered octagonal number.

It is an amenable number.

8638029481 is a deficient number, since it is larger than the sum of its proper divisors (92942).

8638029481 is an frugal number, since it uses more digits than its factorization.

8638029481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185882 (or 92941 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The cubic root of 8638029481 is about 2051.8151269246.

Multiplying 8638029481 by its sum of digits (49), we get a square (423263444569 = 650587²).

The spelling of 8638029481 in words is "eight billion, six hundred thirty-eight million, twenty-nine thousand, four hundred eighty-one".