996557 has 12 divisors (see below), whose sum is σ = 1108188. Its totient is φ = 892800.

The previous prime is 996551. The next prime is 996563. The reversal of 996557 is 755699.

It is an interprime number because it is at equal distance from previous prime (996551) and next prime (996563).

It can be written as a sum of positive squares in 2 ways, for example, as 346921 + 649636 = 589^2 + 806^2 .

It is not a de Polignac number, because 996557 - 2⁸ = 996301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16307 + ... + 16367.

It is an arithmetic number, because the mean of its divisors is an integer number (92349).

2⁹⁹⁶⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

996557 is a deficient number, since it is larger than the sum of its proper divisors (111631).

996557 is a wasteful number, since it uses less digits than its factorization.

With its successor (996558) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (109).

996557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 109 counting only the distinct ones).

The product of its digits is 85050, while the sum is 41.

The square root of 996557 is about 998.2770156625. The cubic root of 996557 is about 99.8851013669.

The spelling of 996557 in words is "nine hundred ninety-six thousand, five hundred fifty-seven".