1968309 has 24 divisors (see below), whose sum is σ = 3286400. Its totient is φ = 1111968.

The previous prime is 1968301. The next prime is 1968331. The reversal of 1968309 is 9038691.

It is not a de Polignac number, because 1968309 - 2³ = 1968301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968301) 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, 9792 + ... + 9990.

2^1968309 is an apocalyptic number.

It is an amenable number.

1968309 is a deficient number, since it is larger than the sum of its proper divisors (1318091).

1968309 is a wasteful number, since it uses less digits than its factorization.

1968309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1968309 is about 1402.9643616286. The cubic root of 1968309 is about 125.3230895191.

The spelling of 1968309 in words is "one million, nine hundred sixty-eight thousand, three hundred nine".