1921936383 has 16 divisors (see below), whose sum is σ = 2850647040. Its totient is φ = 1279790712.

The previous prime is 1921936337. The next prime is 1921936391. The reversal of 1921936383 is 3836391291.

1921936383 is a `hidden beast` number, since 1 + 9 + 2 + 1 + 9 + 3 + 638 + 3 = 666.

It is not a de Polignac number, because 1921936383 - 2¹⁴ = 1921919999 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921936483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17941 + ... + 64542.

It is an arithmetic number, because the mean of its divisors is an integer number (178165440).

Almost surely, 2^1921936383 is an apocalyptic number.

1921936383 is a deficient number, since it is larger than the sum of its proper divisors (928710657).

1921936383 is an equidigital number, since it uses as much as digits as its factorization.

1921936383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83355 (or 83349 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 1921936383 is about 43839.8948789798. The cubic root of 1921936383 is about 1243.3106947859.

The spelling of 1921936383 in words is "one billion, nine hundred twenty-one million, nine hundred thirty-six thousand, three hundred eighty-three".