1906806893 has 2 divisors, whose sum is σ = 1906806894. Its totient is φ = 1906806892.

The previous prime is 1906806871. The next prime is 1906806907. The reversal of 1906806893 is 3986086091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1906806889 + 4 = 43667^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 1906806893 - 2¹² = 1906802797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1906806823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953403446 + 953403447.

It is an arithmetic number, because the mean of its divisors is an integer number (953403447).

Almost surely, 2^1906806893 is an apocalyptic number.

It is an amenable number.

1906806893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906806893 is an equidigital number, since it uses as much as digits as its factorization.

1906806893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 1906806893 is about 43667.0000458012. Note that the first 4 decimals coincide. The cubic root of 1906806893 is about 1240.0396477524.

The spelling of 1906806893 in words is "one billion, nine hundred six million, eight hundred six thousand, eight hundred ninety-three".