827139481 has 8 divisors (see below), whose sum is σ = 945633920. Its totient is φ = 708727968.

The previous prime is 827139463. The next prime is 827139491. The reversal of 827139481 is 184931728.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 827139481 - 2⁵ = 827139449 is a prime.

It is a super-2 number, since 2×827139481² = 1368319442057898722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (827139431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2365 + ... + 40741.

It is an arithmetic number, because the mean of its divisors is an integer number (118204240).

Almost surely, 2^827139481 is an apocalyptic number.

It is an amenable number.

827139481 is a deficient number, since it is larger than the sum of its proper divisors (118494439).

827139481 is a wasteful number, since it uses less digits than its factorization.

827139481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41463.

The product of its digits is 96768, while the sum is 43.

The square root of 827139481 is about 28760.0327016504. The cubic root of 827139481 is about 938.6987733534.

The spelling of 827139481 in words is "eight hundred twenty-seven million, one hundred thirty-nine thousand, four hundred eighty-one".