1985336867 has 2 divisors, whose sum is σ = 1985336868. Its totient is φ = 1985336866.

The previous prime is 1985336849. The next prime is 1985336893. The reversal of 1985336867 is 7686335891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1985336867 - 2⁶ = 1985336803 is a prime.

It is not a weakly prime, because it can be changed into another prime (1985336807) 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, 992668433 + 992668434.

It is an arithmetic number, because the mean of its divisors is an integer number (992668434).

Almost surely, 2^1985336867 is an apocalyptic number.

1985336867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985336867 is an equidigital number, since it uses as much as digits as its factorization.

1985336867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 56.

The square root of 1985336867 is about 44557.1191505914. The cubic root of 1985336867 is about 1256.8344293178.

The spelling of 1985336867 in words is "one billion, nine hundred eighty-five million, three hundred thirty-six thousand, eight hundred sixty-seven".