1921793 has 8 divisors (see below), whose sum is σ = 2073120. Its totient is φ = 1775520.

The previous prime is 1921789. The next prime is 1921813. The reversal of 1921793 is 3971291.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1921793 - 2² = 1921789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1921723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455 + ... + 2012.

It is an arithmetic number, because the mean of its divisors is an integer number (259140).

2^1921793 is an apocalyptic number.

It is an amenable number.

1921793 is a deficient number, since it is larger than the sum of its proper divisors (151327).

1921793 is a wasteful number, since it uses less digits than its factorization.

1921793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527.

The product of its digits is 3402, while the sum is 32.

The square root of 1921793 is about 1386.2874882217. The cubic root of 1921793 is about 124.3279775613.

It can be divided in two parts, 19 and 21793, that added together give a palindrome (21812).

The spelling of 1921793 in words is "one million, nine hundred twenty-one thousand, seven hundred ninety-three".