996985597 has 4 divisors (see below), whose sum is σ = 1015796700. Its totient is φ = 978174496.

The previous prime is 996985567. The next prime is 996985603. The reversal of 996985597 is 795589699.

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 726086916 + 270898681 = 26946^2 + 16459^2 .

It is a cyclic number.

It is not a de Polignac number, because 996985597 - 2⁷ = 996985469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996985567) 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, 9405472 + ... + 9405577.

It is an arithmetic number, because the mean of its divisors is an integer number (253949175).

Almost surely, 2^996985597 is an apocalyptic number.

It is an amenable number.

996985597 is a deficient number, since it is larger than the sum of its proper divisors (18811103).

996985597 is a wasteful number, since it uses less digits than its factorization.

996985597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18811102.

The product of its digits is 55112400, while the sum is 67.

The square root of 996985597 is about 31575.0787330768. The cubic root of 996985597 is about 998.9941876808.

The spelling of 996985597 in words is "nine hundred ninety-six million, nine hundred eighty-five thousand, five hundred ninety-seven".