996637 has 2 divisors, whose sum is σ = 996638. Its totient is φ = 996636.

The previous prime is 996631. The next prime is 996647. The reversal of 996637 is 736699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948676 + 47961 = 974^2 + 219^2 .

It is an emirp because it is prime and its reverse (736699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 996637 - 2³ = 996629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 996637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498318 + 498319.

It is an arithmetic number, because the mean of its divisors is an integer number (498319).

2⁹⁹⁶⁶³⁷ is an apocalyptic number.

It is an amenable number.

996637 is a deficient number, since it is larger than the sum of its proper divisors (1).

996637 is an equidigital number, since it uses as much as digits as its factorization.

996637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 40.

The square root of 996637 is about 998.3170838967. The cubic root of 996637 is about 99.8877741006.

The spelling of 996637 in words is "nine hundred ninety-six thousand, six hundred thirty-seven".