1923689 has 2 divisors, whose sum is σ = 1923690. Its totient is φ = 1923688.

The previous prime is 1923683. The next prime is 1923707. The reversal of 1923689 is 9863291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1283689 + 640000 = 1133^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1923689 - 2²⁰ = 875113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1923683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961844 + 961845.

It is an arithmetic number, because the mean of its divisors is an integer number (961845).

2^1923689 is an apocalyptic number.

It is an amenable number.

1923689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1923689 is an equidigital number, since it uses as much as digits as its factorization.

1923689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 1923689 is about 1386.9711604788. The cubic root of 1923689 is about 124.3688505667.

The spelling of 1923689 in words is "one million, nine hundred twenty-three thousand, six hundred eighty-nine".