827901081 has 20 divisors (see below), whose sum is σ = 1413419392. Its totient is φ = 473086008.

The previous prime is 827901073. The next prime is 827901091. The reversal of 827901081 is 180109728.

It is not a de Polignac number, because 827901081 - 2³ = 827901073 is a prime.

It is a super-2 number, since 2×827901081² = 1370840399841937122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (827901091) 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 19 ways as a sum of consecutive naturals, for example, 729505 + ... + 730638.

Almost surely, 2^827901081 is an apocalyptic number.

827901081 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

827901081 is a deficient number, since it is larger than the sum of its proper divisors (585518311).

827901081 is a wasteful number, since it uses less digits than its factorization.

827901081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460162 (or 1460153 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 827901081 is about 28773.2702520933. The cubic root of 827901081 is about 938.9867915544.

The spelling of 827901081 in words is "eight hundred twenty-seven million, nine hundred one thousand, eighty-one".