1923993 has 10 divisors (see below), whose sum is σ = 2874234. Its totient is φ = 1282608.

The previous prime is 1923991. The next prime is 1924003. The reversal of 1923993 is 3993291.

It can be written as a sum of positive squares in only one way, i.e., 1774224 + 149769 = 1332^2 + 387^2 .

It is not a de Polignac number, because 1923993 - 2¹ = 1923991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1923991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11796 + ... + 11957.

2^1923993 is an apocalyptic number.

It is an amenable number.

1923993 is a deficient number, since it is larger than the sum of its proper divisors (950241).

1923993 is an equidigital number, since it uses as much as digits as its factorization.

1923993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23765 (or 23756 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 1923993 is about 1387.0807474693. The cubic root of 1923993 is about 124.3754015458.

It can be divided in two parts, 1923 and 993, that added together give a square (2916 = 54²).

The spelling of 1923993 in words is "one million, nine hundred twenty-three thousand, nine hundred ninety-three".