1870006861 has 2 divisors, whose sum is σ = 1870006862. Its totient is φ = 1870006860.

The previous prime is 1870006799. The next prime is 1870006871. The reversal of 1870006861 is 1686000781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1843070761 + 26936100 = 42931^2 + 5190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1870006861 - 2¹⁷ = 1869875789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1870006861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1870006871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 935003430 + 935003431.

It is an arithmetic number, because the mean of its divisors is an integer number (935003431).

Almost surely, 2^1870006861 is an apocalyptic number.

It is an amenable number.

1870006861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1870006861 is an equidigital number, since it uses as much as digits as its factorization.

1870006861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1870006861 is about 43243.5759506542. The cubic root of 1870006861 is about 1232.0104738965.

The spelling of 1870006861 in words is "one billion, eight hundred seventy million, six thousand, eight hundred sixty-one".