164531669 has 2 divisors, whose sum is σ = 164531670. Its totient is φ = 164531668.

The previous prime is 164531639. The next prime is 164531687. The reversal of 164531669 is 966135461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94809169 + 69722500 = 9737^2 + 8350^2 .

It is an emirp because it is prime and its reverse (966135461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164531669 - 2²⁰ = 163483093 is a prime.

It is a super-2 number, since 2×164531669² = 54141340207851122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164531639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82265834 + 82265835.

It is an arithmetic number, because the mean of its divisors is an integer number (82265835).

Almost surely, 2^164531669 is an apocalyptic number.

It is an amenable number.

164531669 is a deficient number, since it is larger than the sum of its proper divisors (1).

164531669 is an equidigital number, since it uses as much as digits as its factorization.

164531669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The square root of 164531669 is about 12826.9898651242. The cubic root of 164531669 is about 547.9612332052.

The spelling of 164531669 in words is "one hundred sixty-four million, five hundred thirty-one thousand, six hundred sixty-nine".