2091786937 has 2 divisors, whose sum is σ = 2091786938. Its totient is φ = 2091786936.

The previous prime is 2091786887. The next prime is 2091786943. The reversal of 2091786937 is 7396871902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2062885561 + 28901376 = 45419^2 + 5376^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091786937 - 2²³ = 2083398329 is a prime.

It is not a weakly prime, because it can be changed into another prime (2091786337) 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, 1045893468 + 1045893469.

It is an arithmetic number, because the mean of its divisors is an integer number (1045893469).

Almost surely, 2^2091786937 is an apocalyptic number.

It is an amenable number.

2091786937 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091786937 is an equidigital number, since it uses as much as digits as its factorization.

2091786937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 2091786937 is about 45736.0572961859. The cubic root of 2091786937 is about 1278.9075430112.

The spelling of 2091786937 in words is "two billion, ninety-one million, seven hundred eighty-six thousand, nine hundred thirty-seven".