1969668 has 18 divisors (see below), whose sum is σ = 4978974. Its totient is φ = 656544.

The previous prime is 1969661. The next prime is 1969691. The reversal of 1969668 is 8669691.

It can be written as a sum of positive squares in only one way, i.e., 1557504 + 412164 = 1248^2 + 642^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (1969661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27321 + ... + 27392.

2^1969668 is an apocalyptic number.

1969668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1969668 is an abundant number, since it is smaller than the sum of its proper divisors (3009306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1969668 is a wasteful number, since it uses less digits than its factorization.

1969668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54723 (or 54718 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 1969668 is about 1403.4486096755. The cubic root of 1969668 is about 125.3519255905.

The spelling of 1969668 in words is "one million, nine hundred sixty-nine thousand, six hundred sixty-eight".