164913785 has 4 divisors (see below), whose sum is σ = 197896548. Its totient is φ = 131931024.

The previous prime is 164913781. The next prime is 164913803. The reversal of 164913785 is 587319461.

164913785 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 116985856 + 47927929 = 10816^2 + 6923^2 .

It is a cyclic number.

It is not a de Polignac number, because 164913785 - 2² = 164913781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164913781) 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, 16491374 + ... + 16491383.

It is an arithmetic number, because the mean of its divisors is an integer number (49474137).

Almost surely, 2^164913785 is an apocalyptic number.

It is an amenable number.

164913785 is a deficient number, since it is larger than the sum of its proper divisors (32982763).

164913785 is an equidigital number, since it uses as much as digits as its factorization.

164913785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32982762.

The product of its digits is 181440, while the sum is 44.

The square root of 164913785 is about 12841.8762258480. The cubic root of 164913785 is about 548.3851087823.

The spelling of 164913785 in words is "one hundred sixty-four million, nine hundred thirteen thousand, seven hundred eighty-five".