167109091 has 2 divisors, whose sum is σ = 167109092. Its totient is φ = 167109090.

The previous prime is 167109077. The next prime is 167109109. The reversal of 167109091 is 190901761.

Together with next prime (167109109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 167109091 - 2²⁷ = 32891363 is a prime.

It is not a weakly prime, because it can be changed into another prime (167109491) 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, 83554545 + 83554546.

It is an arithmetic number, because the mean of its divisors is an integer number (83554546).

Almost surely, 2^167109091 is an apocalyptic number.

167109091 is a deficient number, since it is larger than the sum of its proper divisors (1).

167109091 is an equidigital number, since it uses as much as digits as its factorization.

167109091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 167109091 is about 12927.0681517504. The cubic root of 167109091 is about 550.8077288928.

The spelling of 167109091 in words is "one hundred sixty-seven million, one hundred nine thousand, ninety-one".