1985923 has 4 divisors (see below), whose sum is σ = 2102760. Its totient is φ = 1869088.

The previous prime is 1985903. The next prime is 1985939. The reversal of 1985923 is 3295891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1985923 - 2¹⁷ = 1854851 is a prime.

It is a d-powerful number, because it can be written as 1 + 9 + 8 + 5⁹ + 9 + 2¹⁵ + 3 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1985903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58393 + ... + 58426.

It is an arithmetic number, because the mean of its divisors is an integer number (525690).

2^1985923 is an apocalyptic number.

1985923 is a deficient number, since it is larger than the sum of its proper divisors (116837).

1985923 is a wasteful number, since it uses less digits than its factorization.

1985923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116836.

The product of its digits is 19440, while the sum is 37.

The square root of 1985923 is about 1409.2278027345. The cubic root of 1985923 is about 125.6958102645.

The spelling of 1985923 in words is "one million, nine hundred eighty-five thousand, nine hundred twenty-three".