827291897 has 4 divisors (see below), whose sum is σ = 830842740. Its totient is φ = 823741056.

The previous prime is 827291887. The next prime is 827291911. The reversal of 827291897 is 798192728.

It is a happy number.

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 511483456 + 315808441 = 22616^2 + 17771^2 .

It is a cyclic number.

It is not a de Polignac number, because 827291897 - 2¹² = 827287801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (827291887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1775072 + ... + 1775537.

It is an arithmetic number, because the mean of its divisors is an integer number (207710685).

Almost surely, 2^827291897 is an apocalyptic number.

It is an amenable number.

827291897 is a deficient number, since it is larger than the sum of its proper divisors (3550843).

827291897 is a wasteful number, since it uses less digits than its factorization.

827291897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550842.

The product of its digits is 1016064, while the sum is 53.

The square root of 827291897 is about 28762.6823679573. The cubic root of 827291897 is about 938.7564274446.

The spelling of 827291897 in words is "eight hundred twenty-seven million, two hundred ninety-one thousand, eight hundred ninety-seven".