1811921483 has 2 divisors, whose sum is σ = 1811921484. Its totient is φ = 1811921482.

The previous prime is 1811921431. The next prime is 1811921521. The reversal of 1811921483 is 3841291181.

It is an a-pointer prime, because the next prime (1811921521) can be obtained adding 1811921483 to its sum of digits (38).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1811921483 - 2⁸ = 1811921227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1811921983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905960741 + 905960742.

It is an arithmetic number, because the mean of its divisors is an integer number (905960742).

Almost surely, 2^1811921483 is an apocalyptic number.

1811921483 is a deficient number, since it is larger than the sum of its proper divisors (1).

1811921483 is an equidigital number, since it uses as much as digits as its factorization.

1811921483 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 38.

The square root of 1811921483 is about 42566.6710349776. The cubic root of 1811921483 is about 1219.1200056916.

The spelling of 1811921483 in words is "one billion, eight hundred eleven million, nine hundred twenty-one thousand, four hundred eighty-three".