1968651 has 16 divisors (see below), whose sum is σ = 3088800. Its totient is φ = 1234944.

The previous prime is 1968641. The next prime is 1968679. The reversal of 1968651 is 1568691.

It is not a de Polignac number, because 1968651 - 2⁹ = 1968139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1968611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1686 + ... + 2603.

It is an arithmetic number, because the mean of its divisors is an integer number (193050).

2^1968651 is an apocalyptic number.

1968651 is a deficient number, since it is larger than the sum of its proper divisors (1120149).

1968651 is a wasteful number, since it uses less digits than its factorization.

1968651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315 (or 4309 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1968651 is about 1403.0862411128. The cubic root of 1968651 is about 125.3303475283.

The spelling of 1968651 in words is "one million, nine hundred sixty-eight thousand, six hundred fifty-one".