164110991 has 8 divisors (see below), whose sum is σ = 179122944. Its totient is φ = 149114520.

The previous prime is 164110967. The next prime is 164110997. The reversal of 164110991 is 199011461.

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 164110991 - 2¹⁸ = 163848847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164110997) 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, 38996 + ... + 42998.

It is an arithmetic number, because the mean of its divisors is an integer number (22390368).

Almost surely, 2^164110991 is an apocalyptic number.

164110991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

164110991 is a deficient number, since it is larger than the sum of its proper divisors (15011953).

164110991 is a wasteful number, since it uses less digits than its factorization.

164110991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7741.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 164110991 is about 12810.5812124197. The cubic root of 164110991 is about 547.4938217160.

The spelling of 164110991 in words is "one hundred sixty-four million, one hundred ten thousand, nine hundred ninety-one".