164941909 has 4 divisors (see below), whose sum is σ = 179936640. Its totient is φ = 149947180.

The previous prime is 164941897. The next prime is 164941913. The reversal of 164941909 is 909149461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164941909 - 2⁹ = 164941397 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 (164941949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7497349 + ... + 7497370.

It is an arithmetic number, because the mean of its divisors is an integer number (44984160).

Almost surely, 2^164941909 is an apocalyptic number.

It is an amenable number.

164941909 is a deficient number, since it is larger than the sum of its proper divisors (14994731).

164941909 is a wasteful number, since it uses less digits than its factorization.

164941909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14994730.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 164941909 is about 12842.9711904995. The cubic root of 164941909 is about 548.4162804359.

The spelling of 164941909 in words is "one hundred sixty-four million, nine hundred forty-one thousand, nine hundred nine".