1806220937 has 2 divisors, whose sum is σ = 1806220938. Its totient is φ = 1806220936.

The previous prime is 1806220853. The next prime is 1806220939. The reversal of 1806220937 is 7390226081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1694474896 + 111746041 = 41164^2 + 10571^2 .

It is a cyclic number.

It is not a de Polignac number, because 1806220937 - 2⁸ = 1806220681 is a prime.

Together with 1806220939, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1806220937.

It is not a weakly prime, because it can be changed into another prime (1806220939) 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, 903110468 + 903110469.

It is an arithmetic number, because the mean of its divisors is an integer number (903110469).

Almost surely, 2^1806220937 is an apocalyptic number.

It is an amenable number.

1806220937 is a deficient number, since it is larger than the sum of its proper divisors (1).

1806220937 is an equidigital number, since it uses as much as digits as its factorization.

1806220937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1806220937 is about 42499.6580809775. The cubic root of 1806220937 is about 1217.8401579946.

The spelling of 1806220937 in words is "one billion, eight hundred six million, two hundred twenty thousand, nine hundred thirty-seven".