164944669 has 2 divisors, whose sum is σ = 164944670. Its totient is φ = 164944668.

The previous prime is 164944657. The next prime is 164944691. The reversal of 164944669 is 966449461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106605625 + 58339044 = 10325^2 + 7638^2 .

It is a cyclic number.

It is not a de Polignac number, because 164944669 - 2⁷ = 164944541 is a prime.

It is a super-2 number, since 2×164944669² = 54413487663039122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164944609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82472334 + 82472335.

It is an arithmetic number, because the mean of its divisors is an integer number (82472335).

Almost surely, 2^164944669 is an apocalyptic number.

It is an amenable number.

164944669 is a deficient number, since it is larger than the sum of its proper divisors (1).

164944669 is an equidigital number, since it uses as much as digits as its factorization.

164944669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 49.

The square root of 164944669 is about 12843.0786418210. The cubic root of 164944669 is about 548.4193393320.

The spelling of 164944669 in words is "one hundred sixty-four million, nine hundred forty-four thousand, six hundred sixty-nine".