1983775291 has 2 divisors, whose sum is σ = 1983775292. Its totient is φ = 1983775290.

The previous prime is 1983775253. The next prime is 1983775303. The reversal of 1983775291 is 1925773891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1983775291 - 2⁷ = 1983775163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1983770291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991887645 + 991887646.

It is an arithmetic number, because the mean of its divisors is an integer number (991887646).

Almost surely, 2^1983775291 is an apocalyptic number.

1983775291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983775291 is an equidigital number, since it uses as much as digits as its factorization.

1983775291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 52.

The square root of 1983775291 is about 44539.5923982248. The cubic root of 1983775291 is about 1256.5048198842.

The spelling of 1983775291 in words is "one billion, nine hundred eighty-three million, seven hundred seventy-five thousand, two hundred ninety-one".