827981097 has 4 divisors (see below), whose sum is σ = 1103974800. Its totient is φ = 551987396.

The previous prime is 827981083. The next prime is 827981129. The reversal of 827981097 is 790189728.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 827981097 - 2⁴ = 827981081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (827981797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137996847 + ... + 137996852.

It is an arithmetic number, because the mean of its divisors is an integer number (275993700).

Almost surely, 2^827981097 is an apocalyptic number.

It is an amenable number.

827981097 is a deficient number, since it is larger than the sum of its proper divisors (275993703).

827981097 is a wasteful number, since it uses less digits than its factorization.

827981097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275993702.

The product of its (nonzero) digits is 508032, while the sum is 51.

The square root of 827981097 is about 28774.6606756709. The cubic root of 827981097 is about 939.0170413626.

The spelling of 827981097 in words is "eight hundred twenty-seven million, nine hundred eighty-one thousand, ninety-seven".