109691631187 has 2 divisors, whose sum is σ = 109691631188. Its totient is φ = 109691631186.

The previous prime is 109691631167. The next prime is 109691631209. The reversal of 109691631187 is 781136196901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109691631187 - 2³¹ = 107544147539 is a prime.

It is not a weakly prime, because it can be changed into another prime (109691631157) 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, 54845815593 + 54845815594.

It is an arithmetic number, because the mean of its divisors is an integer number (54845815594).

Almost surely, 2^109691631187 is an apocalyptic number.

109691631187 is a deficient number, since it is larger than the sum of its proper divisors (1).

109691631187 is an equidigital number, since it uses as much as digits as its factorization.

109691631187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 52.

The spelling of 109691631187 in words is "one hundred nine billion, six hundred ninety-one million, six hundred thirty-one thousand, one hundred eighty-seven".