1819465873 has 2 divisors, whose sum is σ = 1819465874. Its totient is φ = 1819465872.

The previous prime is 1819465867. The next prime is 1819465889. The reversal of 1819465873 is 3785649181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1420385344 + 399080529 = 37688^2 + 19977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1819465873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1819465873.

It is not a weakly prime, because it can be changed into another prime (1819468873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909732936 + 909732937.

It is an arithmetic number, because the mean of its divisors is an integer number (909732937).

Almost surely, 2^1819465873 is an apocalyptic number.

It is an amenable number.

1819465873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1819465873 is an equidigital number, since it uses as much as digits as its factorization.

1819465873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 52.

The square root of 1819465873 is about 42655.1974910444. The cubic root of 1819465873 is about 1220.8097001077.

The spelling of 1819465873 in words is "one billion, eight hundred nineteen million, four hundred sixty-five thousand, eight hundred seventy-three".