164989025 has 6 divisors (see below), whose sum is σ = 204586422. Its totient is φ = 131991200.

The previous prime is 164989007. The next prime is 164989039. The reversal of 164989025 is 520989461.

It can be written as a sum of positive squares in 3 ways, for example, as 34023889 + 130965136 = 5833^2 + 11444^2 .

It is not a de Polignac number, because 164989025 - 2¹⁶ = 164923489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3299756 + ... + 3299805.

It is an arithmetic number, because the mean of its divisors is an integer number (34097737).

Almost surely, 2^164989025 is an apocalyptic number.

It is an amenable number.

164989025 is a deficient number, since it is larger than the sum of its proper divisors (39597397).

164989025 is an equidigital number, since it uses as much as digits as its factorization.

164989025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599571 (or 6599566 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 164989025 is about 12844.8053702654. The cubic root of 164989025 is about 548.4684942157.

The spelling of 164989025 in words is "one hundred sixty-four million, nine hundred eighty-nine thousand, twenty-five".