164091493 has 8 divisors (see below), whose sum is σ = 165722112. Its totient is φ = 162466416.

The previous prime is 164091491. The next prime is 164091503. The reversal of 164091493 is 394190461.

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 164091493 - 2¹ = 164091491 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 (164091491) 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, 81171 + ... + 83167.

It is an arithmetic number, because the mean of its divisors is an integer number (20715264).

Almost surely, 2^164091493 is an apocalyptic number.

It is an amenable number.

164091493 is a deficient number, since it is larger than the sum of its proper divisors (1630619).

164091493 is a wasteful number, since it uses less digits than its factorization.

164091493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 164091493 is about 12809.8201782851. The cubic root of 164091493 is about 547.4721383068.

The spelling of 164091493 in words is "one hundred sixty-four million, ninety-one thousand, four hundred ninety-three".