164609493 has 4 divisors (see below), whose sum is σ = 219479328. Its totient is φ = 109739660.

The previous prime is 164609477. The next prime is 164609527. The reversal of 164609493 is 394906461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164609493 - 2⁴ = 164609477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164609443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27434913 + ... + 27434918.

It is an arithmetic number, because the mean of its divisors is an integer number (54869832).

Almost surely, 2^164609493 is an apocalyptic number.

It is an amenable number.

164609493 is a deficient number, since it is larger than the sum of its proper divisors (54869835).

164609493 is an equidigital number, since it uses as much as digits as its factorization.

164609493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54869834.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 164609493 is about 12830.0231098779. The cubic root of 164609493 is about 548.0476153859.

The spelling of 164609493 in words is "one hundred sixty-four million, six hundred nine thousand, four hundred ninety-three".