164776109 has 4 divisors (see below), whose sum is σ = 164827104. Its totient is φ = 164725116.

The previous prime is 164776097. The next prime is 164776153. The reversal of 164776109 is 901677461.

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 164776109 - 2⁴ = 164776093 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 (164776169) 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, 20297 + ... + 27230.

It is an arithmetic number, because the mean of its divisors is an integer number (41206776).

Almost surely, 2^164776109 is an apocalyptic number.

It is an amenable number.

164776109 is a deficient number, since it is larger than the sum of its proper divisors (50995).

164776109 is an equidigital number, since it uses as much as digits as its factorization.

164776109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50994.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 164776109 is about 12836.5146749419. The cubic root of 164776109 is about 548.2324623800.

The spelling of 164776109 in words is "one hundred sixty-four million, seven hundred seventy-six thousand, one hundred nine".