1983191 has 8 divisors (see below), whose sum is σ = 2298144. Its totient is φ = 1676160.

The previous prime is 1983143. The next prime is 1983197. The reversal of 1983191 is 1913891.

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 1983191 - 2¹⁴ = 1966807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983197) 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, 1430 + ... + 2451.

It is an arithmetic number, because the mean of its divisors is an integer number (287268).

2^1983191 is an apocalyptic number.

1983191 is a deficient number, since it is larger than the sum of its proper divisors (314953).

1983191 is an equidigital number, since it uses as much as digits as its factorization.

1983191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961.

The product of its digits is 1944, while the sum is 32.

The square root of 1983191 is about 1408.2581439495. The cubic root of 1983191 is about 125.6381446276.

The spelling of 1983191 in words is "one million, nine hundred eighty-three thousand, one hundred ninety-one".