1983951811 has 2 divisors, whose sum is σ = 1983951812. Its totient is φ = 1983951810.

The previous prime is 1983951797. The next prime is 1983951839. The reversal of 1983951811 is 1181593891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1983951811 - 2¹¹ = 1983949763 is a prime.

It is not a weakly prime, because it can be changed into another prime (1983951841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991975905 + 991975906.

It is an arithmetic number, because the mean of its divisors is an integer number (991975906).

Almost surely, 2^1983951811 is an apocalyptic number.

1983951811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983951811 is an equidigital number, since it uses as much as digits as its factorization.

1983951811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 46.

The square root of 1983951811 is about 44541.5739618617. The cubic root of 1983951811 is about 1256.5420874876.

The spelling of 1983951811 in words is "one billion, nine hundred eighty-three million, nine hundred fifty-one thousand, eight hundred eleven".