109491930091 has 2 divisors, whose sum is σ = 109491930092. Its totient is φ = 109491930090.

The previous prime is 109491930043. The next prime is 109491930101. The reversal of 109491930091 is 190039194901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109491930091 - 2¹¹ = 109491928043 is a prime.

It is not a weakly prime, because it can be changed into another prime (109491930011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54745965045 + 54745965046.

It is an arithmetic number, because the mean of its divisors is an integer number (54745965046).

Almost surely, 2^109491930091 is an apocalyptic number.

109491930091 is a deficient number, since it is larger than the sum of its proper divisors (1).

109491930091 is an equidigital number, since it uses as much as digits as its factorization.

109491930091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 46.

The spelling of 109491930091 in words is "one hundred nine billion, four hundred ninety-one million, nine hundred thirty thousand, ninety-one".