1996659 has 24 divisors (see below), whose sum is σ = 3380832. Its totient is φ = 1111680.

The previous prime is 1996649. The next prime is 1996681. The reversal of 1996659 is 9566991.

1996659 = T₃₇₁ + T₃₇₂ + ... + T₃₉₇.

It is not a de Polignac number, because 1996659 - 2⁸ = 1996403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1996609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2197 + ... + 2969.

It is an arithmetic number, because the mean of its divisors is an integer number (140868).

2^1996659 is an apocalyptic number.

1996659 is a deficient number, since it is larger than the sum of its proper divisors (1384173).

1996659 is a wasteful number, since it uses less digits than its factorization.

1996659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 824 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 1996659 is about 1413.0318467749. The cubic root of 1996659 is about 125.9219092839.

The spelling of 1996659 in words is "one million, nine hundred ninety-six thousand, six hundred fifty-nine".