164749517 has 4 divisors (see below), whose sum is σ = 164816700. Its totient is φ = 164682336.

The previous prime is 164749511. The next prime is 164749537. The reversal of 164749517 is 715947461.

164749517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 125574436 + 39175081 = 11206^2 + 6259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164749517 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 (164749511) 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, 29768 + ... + 34865.

It is an arithmetic number, because the mean of its divisors is an integer number (41204175).

Almost surely, 2^164749517 is an apocalyptic number.

It is an amenable number.

164749517 is a deficient number, since it is larger than the sum of its proper divisors (67183).

164749517 is an equidigital number, since it uses as much as digits as its factorization.

164749517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67182.

The product of its digits is 211680, while the sum is 44.

The square root of 164749517 is about 12835.4788379709. The cubic root of 164749517 is about 548.2029690632.

The spelling of 164749517 in words is "one hundred sixty-four million, seven hundred forty-nine thousand, five hundred seventeen".