164565497 has 4 divisors (see below), whose sum is σ = 164866896. Its totient is φ = 164264100.

The previous prime is 164565493. The next prime is 164565509. The reversal of 164565497 is 794565461.

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, and also an emirpimes, since its reverse is a distinct semiprime: 794565461 = 29 ⋅27398809.

It is not a de Polignac number, because 164565497 - 2² = 164565493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164565493) 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, 149879 + ... + 150972.

It is an arithmetic number, because the mean of its divisors is an integer number (41216724).

Almost surely, 2^164565497 is an apocalyptic number.

It is an amenable number.

164565497 is a deficient number, since it is larger than the sum of its proper divisors (301399).

164565497 is an equidigital number, since it uses as much as digits as its factorization.

164565497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301398.

The product of its digits is 907200, while the sum is 47.

The square root of 164565497 is about 12828.3084231710. The cubic root of 164565497 is about 547.9987845623.

The spelling of 164565497 in words is "one hundred sixty-four million, five hundred sixty-five thousand, four hundred ninety-seven".