1996609 has 2 divisors, whose sum is σ = 1996610. Its totient is φ = 1996608.

The previous prime is 1996583. The next prime is 1996613. The reversal of 1996609 is 9066991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 685584 = 1145^2 + 828^2 .

It is a cyclic number.

It is not a de Polignac number, because 1996609 - 2⁷ = 1996481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1996639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998304 + 998305.

It is an arithmetic number, because the mean of its divisors is an integer number (998305).

2^1996609 is an apocalyptic number.

It is an amenable number.

1996609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996609 is an equidigital number, since it uses as much as digits as its factorization.

1996609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 1996609 is about 1413.0141542108. The cubic root of 1996609 is about 125.9208581700.

Subtracting from 1996609 its sum of digits (40), we obtain a square (1996569 = 1413²).

The spelling of 1996609 in words is "one million, nine hundred ninety-six thousand, six hundred nine".