1921383 has 18 divisors (see below), whose sum is σ = 2867072. Its totient is φ = 1239840.

The previous prime is 1921363. The next prime is 1921393. The reversal of 1921383 is 3831291.

It is not a de Polignac number, because 1921383 - 2⁶ = 1921319 is a prime.

It is a Duffinian number.

1921383 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921363) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15066 + ... + 15192.

2^1921383 is an apocalyptic number.

1921383 is a deficient number, since it is larger than the sum of its proper divisors (945689).

1921383 is a wasteful number, since it uses less digits than its factorization.

1921383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 171 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1921383 is about 1386.1396033589. The cubic root of 1921383 is about 124.3191354546.

It can be divided in two parts, 1921 and 383, that added together give a square (2304 = 48²).

The spelling of 1921383 in words is "one million, nine hundred twenty-one thousand, three hundred eighty-three".