997827685 has 8 divisors (see below), whose sum is σ = 1225239840. Its totient is φ = 779697744.

The previous prime is 997827667. The next prime is 997827689. The reversal of 997827685 is 586728799.

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 997827685 - 2¹¹ = 997825637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997827689) 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 7 ways as a sum of consecutive naturals, for example, 2320315 + ... + 2320744.

It is an arithmetic number, because the mean of its divisors is an integer number (153154980).

Almost surely, 2^997827685 is an apocalyptic number.

It is an amenable number.

997827685 is a deficient number, since it is larger than the sum of its proper divisors (227412155).

997827685 is a wasteful number, since it uses less digits than its factorization.

997827685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4641107.

The product of its digits is 15240960, while the sum is 61.

The square root of 997827685 is about 31588.4106121217. The cubic root of 997827685 is about 999.2753700383.

The spelling of 997827685 in words is "nine hundred ninety-seven million, eight hundred twenty-seven thousand, six hundred eighty-five".