1996997 has 4 divisors (see below), whose sum is σ = 2001036. Its totient is φ = 1992960.

The previous prime is 1996979. The next prime is 1997003. The reversal of 1996997 is 7996991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7996991 = 643 ⋅12437.

It can be written as a sum of positive squares in 2 ways, for example, as 1366561 + 630436 = 1169^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1996997 - 2⁶ = 1996933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996937) 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, 1154 + ... + 2307.

It is an arithmetic number, because the mean of its divisors is an integer number (500259).

2^1996997 is an apocalyptic number.

1996997 is the 1154-th pentagonal number.

It is an amenable number.

1996997 is a deficient number, since it is larger than the sum of its proper divisors (4039).

1996997 is an equidigital number, since it uses as much as digits as its factorization.

1996997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038.

The product of its digits is 275562, while the sum is 50.

The square root of 1996997 is about 1413.1514426982. The cubic root of 1996997 is about 125.9290143535.

The spelling of 1996997 in words is "one million, nine hundred ninety-six thousand, nine hundred ninety-seven".