164797191 has 12 divisors (see below), whose sum is σ = 256351368. Its totient is φ = 101413584.

The previous prime is 164797183. The next prime is 164797211. The reversal of 164797191 is 191797461.

164797191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 164797191 - 2³ = 164797183 is a prime.

It is a super-2 number, since 2×164797191² = 54316228322980962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164797141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 704145 + ... + 704378.

It is an arithmetic number, because the mean of its divisors is an integer number (21362614).

Almost surely, 2^164797191 is an apocalyptic number.

164797191 is a deficient number, since it is larger than the sum of its proper divisors (91554177).

164797191 is a wasteful number, since it uses less digits than its factorization.

164797191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408542 (or 1408539 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 164797191 is about 12837.3358217350. The cubic root of 164797191 is about 548.2558422740.

The spelling of 164797191 in words is "one hundred sixty-four million, seven hundred ninety-seven thousand, one hundred ninety-one".