1856983481 has 2 divisors, whose sum is σ = 1856983482. Its totient is φ = 1856983480.

The previous prime is 1856983441. The next prime is 1856983501. The reversal of 1856983481 is 1843896581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1512509881 + 344473600 = 38891^2 + 18560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1856983481 - 2²⁶ = 1789874617 is a prime.

It is a super-2 number, since 2×1856983481² = 6896775297413754722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1856983441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 928491740 + 928491741.

It is an arithmetic number, because the mean of its divisors is an integer number (928491741).

Almost surely, 2^1856983481 is an apocalyptic number.

It is an amenable number.

1856983481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1856983481 is an equidigital number, since it uses as much as digits as its factorization.

1856983481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 53.

The square root of 1856983481 is about 43092.7311852011. The cubic root of 1856983481 is about 1229.1437584122.

The spelling of 1856983481 in words is "one billion, eight hundred fifty-six million, nine hundred eighty-three thousand, four hundred eighty-one".