164919091 has 8 divisors (see below), whose sum is σ = 176725584. Its totient is φ = 153346560.

The previous prime is 164919049. The next prime is 164919119. The reversal of 164919091 is 190919461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164919091 - 2¹⁹ = 164394803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164919991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57030 + ... + 59851.

It is an arithmetic number, because the mean of its divisors is an integer number (22090698).

Almost surely, 2^164919091 is an apocalyptic number.

164919091 is a deficient number, since it is larger than the sum of its proper divisors (11806493).

164919091 is a wasteful number, since it uses less digits than its factorization.

164919091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116981.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 164919091 is about 12842.0828139364. The cubic root of 164919091 is about 548.3909900375.

The spelling of 164919091 in words is "one hundred sixty-four million, nine hundred nineteen thousand, ninety-one".