164210705 has 4 divisors (see below), whose sum is σ = 197052852. Its totient is φ = 131368560.

The previous prime is 164210693. The next prime is 164210723. The reversal of 164210705 is 507012461.

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 19465744 + 144744961 = 4412^2 + 12031^2 .

It is a de Polignac number, because none of the positive numbers 2^k-164210705 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16421066 + ... + 16421075.

It is an arithmetic number, because the mean of its divisors is an integer number (49263213).

Almost surely, 2^164210705 is an apocalyptic number.

It is an amenable number.

164210705 is a deficient number, since it is larger than the sum of its proper divisors (32842147).

164210705 is an equidigital number, since it uses as much as digits as its factorization.

164210705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32842146.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 164210705 is about 12814.4724823147. The cubic root of 164210705 is about 547.6046851942.

The spelling of 164210705 in words is "one hundred sixty-four million, two hundred ten thousand, seven hundred five".