1600000091 has 2 divisors, whose sum is σ = 1600000092. Its totient is φ = 1600000090.

The previous prime is 1600000069. The next prime is 1600000097. The reversal of 1600000091 is 1900000061.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1600000091 is a prime.

It is a Sophie Germain prime.

1600000091 is a strobogrammatic number because it is the same when read upside-down.

It is not a weakly prime, because it can be changed into another prime (1600000097) 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, 800000045 + 800000046.

It is an arithmetic number, because the mean of its divisors is an integer number (800000046).

Almost surely, 2^1600000091 is an apocalyptic number.

1600000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600000091 is an equidigital number, since it uses as much as digits as its factorization.

1600000091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1600000091 is about 40000.0011375000. The cubic root of 1600000091 is about 1169.6071174589.

The spelling of 1600000091 in words is "one billion, six hundred million, ninety-one", and thus it is an aban number.