164071191 has 4 divisors (see below), whose sum is σ = 218761592. Its totient is φ = 109380792.

The previous prime is 164071181. The next prime is 164071207. The reversal of 164071191 is 191170461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191170461 = 3 ⋅63723487.

It is not a de Polignac number, because 164071191 - 2⁹ = 164070679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164071181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27345196 + ... + 27345201.

It is an arithmetic number, because the mean of its divisors is an integer number (54690398).

Almost surely, 2^164071191 is an apocalyptic number.

164071191 is a deficient number, since it is larger than the sum of its proper divisors (54690401).

164071191 is an equidigital number, since it uses as much as digits as its factorization.

164071191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54690400.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 164071191 is about 12809.0277148580. The cubic root of 164071191 is about 547.4495589568.

The spelling of 164071191 in words is "one hundred sixty-four million, seventy-one thousand, one hundred ninety-one".