164820925 has 24 divisors (see below), whose sum is σ = 209674080. Its totient is φ = 128481600.

The previous prime is 164820923. The next prime is 164820941. The reversal of 164820925 is 529028461.

It is not a de Polignac number, because 164820925 - 2¹ = 164820923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164820923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192799 + ... + 193651.

It is an arithmetic number, because the mean of its divisors is an integer number (8736420).

Almost surely, 2^164820925 is an apocalyptic number.

It is an amenable number.

164820925 is a deficient number, since it is larger than the sum of its proper divisors (44853155).

164820925 is a wasteful number, since it uses less digits than its factorization.

164820925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 164820925 is about 12838.2602014447. The cubic root of 164820925 is about 548.2821608447.

The spelling of 164820925 in words is "one hundred sixty-four million, eight hundred twenty thousand, nine hundred twenty-five".