164997065 has 4 divisors (see below), whose sum is σ = 197996484. Its totient is φ = 131997648.

The previous prime is 164997029. The next prime is 164997067. The reversal of 164997065 is 560799461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33825856 + 131171209 = 5816^2 + 11453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164997065 is a prime.

It is a super-2 number, since 2×164997065² = 54448062917228450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164997067) 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, 16499702 + ... + 16499711.

It is an arithmetic number, because the mean of its divisors is an integer number (49499121).

Almost surely, 2^164997065 is an apocalyptic number.

It is an amenable number.

164997065 is a deficient number, since it is larger than the sum of its proper divisors (32999419).

164997065 is an equidigital number, since it uses as much as digits as its factorization.

164997065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32999418.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 164997065 is about 12845.1183334370. The cubic root of 164997065 is about 548.4774031215.

The spelling of 164997065 in words is "one hundred sixty-four million, nine hundred ninety-seven thousand, sixty-five".