164708685 has 24 divisors (see below), whose sum is σ = 292461624. Its totient is φ = 85701120.

The previous prime is 164708669. The next prime is 164708717. The reversal of 164708685 is 586807461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 381924 + 164326761 = 618^2 + 12819^2 .

It is not a de Polignac number, because 164708685 - 2⁴ = 164708669 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 164708685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42792 + ... + 46481.

It is an arithmetic number, because the mean of its divisors is an integer number (12185901).

Almost surely, 2^164708685 is an apocalyptic number.

164708685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164708685 is a deficient number, since it is larger than the sum of its proper divisors (127752939).

164708685 is a wasteful number, since it uses less digits than its factorization.

164708685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89325 (or 89322 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 164708685 is about 12833.8881481802. Note that the first 3 decimals coincide. The cubic root of 164708685 is about 548.1576759145.

The spelling of 164708685 in words is "one hundred sixty-four million, seven hundred eight thousand, six hundred eighty-five".