164969653 has 4 divisors (see below), whose sum is σ = 165490380. Its totient is φ = 164448928.

The previous prime is 164969633. The next prime is 164969657. The reversal of 164969653 is 356969461.

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 23882769 + 141086884 = 4887^2 + 11878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164969653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164969597 and 164969606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164969657) 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, 259888 + ... + 260521.

It is an arithmetic number, because the mean of its divisors is an integer number (41372595).

Almost surely, 2^164969653 is an apocalyptic number.

It is an amenable number.

164969653 is a deficient number, since it is larger than the sum of its proper divisors (520727).

164969653 is an equidigital number, since it uses as much as digits as its factorization.

164969653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520726.

The product of its digits is 1049760, while the sum is 49.

The square root of 164969653 is about 12844.0512689727. The cubic root of 164969653 is about 548.4470274392.

The spelling of 164969653 in words is "one hundred sixty-four million, nine hundred sixty-nine thousand, six hundred fifty-three".