109431678091 has 2 divisors, whose sum is σ = 109431678092. Its totient is φ = 109431678090.

The previous prime is 109431678053. The next prime is 109431678149. The reversal of 109431678091 is 190876134901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109431678091 - 2⁷ = 109431677963 is a prime.

It is not a weakly prime, because it can be changed into another prime (109431678491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54715839045 + 54715839046.

It is an arithmetic number, because the mean of its divisors is an integer number (54715839046).

Almost surely, 2^109431678091 is an apocalyptic number.

109431678091 is a deficient number, since it is larger than the sum of its proper divisors (1).

109431678091 is an equidigital number, since it uses as much as digits as its factorization.

109431678091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 109431678091 in words is "one hundred nine billion, four hundred thirty-one million, six hundred seventy-eight thousand, ninety-one".