164095091 has 4 divisors (see below), whose sum is σ = 164124000. Its totient is φ = 164066184.

The previous prime is 164095069. The next prime is 164095103. The reversal of 164095091 is 190590461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190590461 = 10343 ⋅18427.

It is a cyclic number.

It is not a de Polignac number, because 164095091 - 2⁶ = 164095027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164095291) 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, 2816 + ... + 18333.

It is an arithmetic number, because the mean of its divisors is an integer number (41031000).

Almost surely, 2^164095091 is an apocalyptic number.

164095091 is a deficient number, since it is larger than the sum of its proper divisors (28909).

164095091 is an equidigital number, since it uses as much as digits as its factorization.

164095091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28908.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 164095091 is about 12809.9606166452. The cubic root of 164095091 is about 547.4761397134.

The spelling of 164095091 in words is "one hundred sixty-four million, ninety-five thousand, ninety-one".